Electricity Saving Tips For Homes And Offices

Energy Efficient Lights – use CFLs, T5s and LEDs

By on July 28, 2015

Hindi Translation: ऊर्जा कुशल लाइट्स - सीएफएल, T5 और एलईडी का उपयोग

Lighting consumption constitutes about 30% of residential consumption as per a study by Ministry of Environment and Forest in India. Its contribution in your electricity bill may vary from 10-20% depending on your total bill. Although it may not be a major contributor in the electricity bill, the energy efficient options are fairly simpler to implement and provide higher rate of returns.

Lights

Latest technical advancements in lighting provide with a lot of options for energy savings today. The energy saving lighting options are a little expensive compared to the old incandescent options and old tubelights, but the payback time for them considering the savings it provides is quite short depending on the usage (mostly less than a year for average usage). Also the life of the new energy saving lighting options are far better than those of the old lights, which makes them much more attractive. There are several lighting options that are available in the market which are discussed below:

1) Incandescent Bulbs: The traditional yellow light bulbs which were available in various variants: 40W, 60W and 100W, are the most inefficient in terms of energy consumption. 90% of the energy they consume is lost as heat and only 10% is converted into useful light. Although they are still quite inexpensive (Rs 10/-) and a lot of households still use it, but they are the energy guzzlers. Many countries in the world have stopped producing them. Even if they are still there in working condition in several households, it makes a lot of sense to replace them with energy efficient options just from a cost saving perspective.

2) Tubelights: The fluorescent lamps are better than Incandescent bulbs (50-70% better in providing same amount of light) and they have been there in the market since quite some time. It started coming in the form of tubelights (something which most of us have known since our childhood) and later graduated to come in form of CFLs. A typical fluorescent lamp has a ballast (to stabilize the current through the lamp) and a tube. In past tubelights used to come with electromagnetic ballast which caused the lights to flicker on start. Now a days we get electronic ballast which prevents the fluorescent lamps to flicker. Electromagnetic ballast consumes for electricity than an electronic ballast. Most tubelights today have electronic ballast.

Tubelights are also available in various variants: T12, T8 and T5. These numbers represent the thickness of the tubelight. The smaller the number, the higher the efficiency. T5 tubelights with electronic ballast are the best available fluorescent tubelight options in the marketA T12 tubelight with a electromagnetic ballast typically consumes 55W of electricity but a T5 with electronic ballast will consume only 28W of electricity (comparison is for a 4 feet tubelight). Thus a T5 provides about 50% electricity saving over a regular T12 tubelight. T8s are typically 38W tubelights and are better than T12s. Although T5s are little expensive, the payback is within a year. Also their life is quite good and they last for 3-4 years at least. Many companies give 1-2 year replacement warranty on T5s. Thus the payback happens within the warranty period.

3) CFLs: CFLs have been regarded as the best energy saving option in our country since quite some time. CFL is a variant of fluorescent lamps (or tubelights) but has a different application. CFLs act as a point source of light (light originating from one point) whereas tubelights are line source (tubelights have bigger lengths) and thus the area covered by tubelights is lot more than that of CFLs. This is the reason why a lot of people feel that CFLs produce lesser lights than tubelights. Even with equal wattage (2x14W CFLs) the amount of light is felt lesser than a T5 tubelight (of 28W) because of CFL being point source. CFLs being compact in size provide options to create smaller (lower wattage) bulbs that can cater to locations where tubelights provide extra brightness (more than required). CFLs provide up to 70% energy savings over a typical incandescent bulb. Although a little more expensive than a incandescent, payback happens within a year.

4) LEDs: LEDs are the latest and most efficient lighting option which is available in the market. Their electricity consumption is 50% less than that of CFLs and fluorescent lamps for the same amount of light. LEDs also are long lasting with a life of about 10-25 years and their performance remains the same throughout their lifetime (Tubelights and CFLs get dim with time). Although a little expensive (with a payback of about 2 years), the benefit with LEDs is that it is maintenance free. Once installed, it will not need any repair of change for at least 10 years. A lot of companies manufacturing LED options give replacement warranty for up to 10 years which makes the option even more attractive. The only drawback of LEDs is the angle covered by the light. CFLs and tubelights provide lights in 360o where as for LEDs the angle depends on the kind of reflectors used in the bulb.  Some do provide larger angles so that is something that should be checked before buying.

Wattage of the bulb or tubelight has been traditionally used as the measure of amount of light produced by it, but watts does not represent the actual amount of light produced.  The amount of light produced is represented by a term called lumen. So to compare two lights, one should compare the lumen of output and the angle of delivery of light. Wattage just helps one estimate the power consumption.Infographic9 Infographic12 infographic14


  • utk

    we have 4 towers of 10 stories and we have installed cfl and tubelights, will it be a wise decision to save energy by installing led every where. i dont know exactly about watts of them but this is to save our monthly maintenance

    • Bijli Bachao Team

      It certainly can save a lot. At one society in mumbai we were able to save about Rs 15000 per month (out of Rs 45000 per month) by switching to LED. You can read the case study over here: https://www.bijlibachao.com/lights/sharing-experience-of-buying-led-luminaire-for-a-residential-society.html

  • Nizam

    I use 22 Watt CFL bulb in our rooms. 5 CFLs light up our rooms. Consider that each bulb runs 7 hours daily. Now I plan to replace each 22 Watt CFL bulb with 14 Watt Philips LED bulbs (Total 5 Pieces). I would like to know, How much money I can save monthly by replacing 5 22 Watt CFL bulbs with 14 Watt LED bulbs? Please reply at the earliest if possible.

    • Bijli Bachao Team

      Hi Nizam,

      Currently you use 110 Watts (22×5) for 7 hours, which means you use 770 Watt-hour or 0.77 kWH or 0.77 units of electricity per day. If you replace it with 14 watt LED then you would use 14x5x7 = 490 Watt-hour or 0.49 units of electricity per day. So your daily saving would be 0.77-0.49 = 0.28 units of electricity. In a month you would save 0.28 x 30 (assuming 30 days) = 8.4 units of electricity. Your tariff will depend on your city, state and your electricity consumption (you can check the latest tariffs on this link: https://www.bijlibachao.com/news/domestic-electricity-lt-tariff-slabs-and-rates-for-all-states-in-india-in-2015.html). Assuming your average tariff is Rs 5, you would save 8.4×5 = Rs 42 per month.

  • sd

    sir,
    what is led replacement for 45w hpsv bulb (please attach a link if possible)?

    • Bijli Bachao Team

      Hi SD,

      Typical HPSV lamp has a luminous efficacy of about 80 lumens/watt. LEDs have 100-110 lumens/watt. So assuming LED to have 105 lumens/watt efficacy the lamp wattage required would be 45×80/105 = 34. However LEDs are quite bright in general. So 25-30 Watt LED outdoor lighting replacement should be good enough to replace 45W HPSV.

  • d k de

    How to select LED tube lights. Who are proven manufacturers? Wall mounting type with good illumination.

    • Bijli Bachao Team

      Hello Mr De,

      If you are looking at established light manufacturers then you can go for Osram (best) or Havells or Philips. However if you want to explore more then you can look at these articles on our website that explain more:

      https://www.bijlibachao.com/lights/sharing-experience-of-buying-led-luminaire-for-a-residential-society.html

      https://www.bijlibachao.com/lights/led-lamp-led-heatsink-heatpipe-what-is-heatsink-material-aluminium-copper-thermoplastic.html

      https://www.bijlibachao.com/lights/led-lightning-outdoor-enclosure-of-led-ip-rating-encasing-ip55-ip65-lm80-lm79-buying-led-bulbs.html

  • Deepak

    Dear Sir, I am having an energy saver tubelight of orient pspo having T5 tube of 28W (whole tubelight module with fitting…not just the glass tube, something like this but not exact same model http://www.orientelectric.com/shop-online/slim_line_pearl_28w-239.aspx ). I bought the tubelight for Rs. 650 and it stopped working after 1 years and 2 months. I thought the tube is damaged so i changed it but the problem is with the tubelight circuit. Either electronic ballast or something other is wrong with it. However, when i called over orient team they simply refused to repair the tubelight because it was out of the warranty period which was of 1 year. And none of local unauthorized repairers in my city is ready to repair it they said its impossible. I am very disappointed on this early breakdown of the tubelight. Please help me what should I do. Is there anyway to repair it or shall i simply throw that away and buy a new one. Buying a new one will again cost me much so please of there is any way to repair old one do tell me please.

    • Bijli Bachao Team

      Hi Deepak,

      It is very difficult for us to tell the fault sitting remotely. Are they not repairing it even for some payment? At least they can help find the cause. You will have to contact a local electrician to find the fault with the same.

    • Deepak

      Thank you for replying sir. I contacted company but they simply refused…they are not repairing it even if i am ready to pay. And obviously I am not going to pay more than in what a new tubelight comes. I opened the circuit and found that in the circuit, a current limiting resistor, that was soldered to one of the wire incoming from main, is blown off. The tragedy is, i cant figure out that the resistor is of how many ohms since the blown resistor didn’t had color coding, it was just of pale light olive green color. I also dont have any other spare tubelight of same brand and model and also…since the resistor is damaged , i cant use multimeter. However i called company for the part of which i was having doubt but they are just unhelpful. I think that i have no option than to buy new one. I had good experience with havells E-Lite desire tubelight fixture, its working since 1 yr 9 months, didnt even changed the tube yet, even once. Orient has simply disappointed me. I’d buy a new one please suggest me which one to buy.

    • Bijli Bachao Team

      Hi Deepak,

      You may try Havells T5 or Philips T5. Our experience with Havells has been quite good.

    • Anand

      HI, I have Crompton Greaves litelight T5 fixtures (5 nos) since 2009, which i have used thoroughly and the original tube/lamps are still burning bright and expecting many more years to come. I suppose T5 fixtures of Crompton greaves are the best bet maybe followed by Philips. I feel smaller players like orient may not be up to the mark of the bigger ones. i suggest u to go for CG.

  • rootbeer man

    Do they make a t5 in gold or yellow color yet?

    • Bijli Bachao Team

      T5 tubelights are available in various color temperatures. So yes they are available in yellow color as well. You will have to check the color temperature of the tubelight. It should be around 2700K to 3200K. For more details check http://en.wikipedia.org/wiki/Fluorescent_lamp#/media/File:Kelvin_Temperature_Chart.svg

  • Satyam

    I need to Purchase Light for my Fish Tank
    i was thinking for a 24″ – T5 Fluorescent TubeLight which consumes 20W
    But later in many sites it was written that LED Lights are best and Save’s Lot of Energy
    But i am really confused because when i searched for 5 M White LED Light Strip 5050 on eBay.in, it says it consumes 72W and is 900LM (color temp 9000k)

    • Bijli Bachao Team

      Hello Satyam,

      A 2 feet T5 tubelight consumes about 14 watts and if you are looking for equivalent then you can get a 2 feet T8 or T5 LED Tubelight of 9 Watts. You can easily get them on ebay or Snapdeal. Here are a few links:

      http://www.ebay.in/itm/like/131268753651?aff_source=Sok-Goog
      http://www.snapdeal.com/product/syska-t5-2-feet-led/619517275463

  • Ramakrishna Rao B V

    I have T5 Tube Light fitting – Electronic Tubelight Fixture – 28 Watts – 4 Feet. Can it be replaced by LED tube without the frame

    • Bijli Bachao Team

      You can certainly replace it with T5 LED tubelight. Also in LED T5 will be cheaper than T8.

  • Archana

    hi abhishek,

    my room is about 10*18 ft. and in one corner my kitchen is there and in another corner I have kept bed. how may tube light I have to install considering if I am in kitchen the light wont disturb the sleeping one. I am planning to put 4 tubes of 1 ft. of T5.

    We are total seven family members including 2 childrens so which geyser will do for getting hot water for bath and how much will be increase in bill per month. we leave in mumbai and BEST supplies electricity.

    • Abhishek Jain

      Hi Archana,

      For a 180 sq ft room I think 4 numbers of 2ft T5s would be better than 1ft T5. Do you need geyser for 1 bathroom or more?

  • Pravesh

    Hi,

    There’re many brands offering T5 tube lights ranging starting from Rs545 of various brands whereas I didn’t see metallic frame tubelight anywhere. Could you share comparison between various brands & their luminous.

    • Abhishek Jain

      Hi Pravesh,

      T5 tube lights roughly give around 2600 lumens. It can be plus or minus. However it is very important that you get one with metallic frame as the plastic ones tend to break in a few years. You can go for Havells as I know that they have metallic frame T5s.

    • Pravesh

      Hi Abhisek,

      I did look at various brand website including Havells. Many mentioned as “extruded aluminium”. Is it same as metallic frame? Would you mind sharing exact model? Even Havells include same description for multiple model yet price varies. Why? Many shop keeper have limited option of brand Wipro/Phillips.

    • Abhishek Jain

      Hi Pravesh,

      Aluminium body is the same as metallic frame. Sometime back most of them were coming in plastics which used to break as the ends of the tubelights used to release heat. So everytime the whole frame had to be replaced. But if you get one with metallic frame, then you will just have to replace the tube after the end of its life and the tube will just cost about Rs 125 or so.

      As for the types, these are these available: 1) One feet 8W T5 2) two feet 14W T5 3) four feet 28W T5 and 4) four feet 56 W T5.

      Within each of them they are available in multiple colors starting from white to yellow. 28W T5 is the one which is equivalent to old tubelights. 56 W will give double the amount of light and should be used in place of two old tubelights.

      Both 28W and 56W are 4 ft tubes and the 56W one will cost more than 28W one. You can go for a philips one as well.

  • S S

    Hi Abhisek,
    Need to buy Led downlights for home. Advise which brand is good Osram 1yr, Syska 2yr,Arraystrom 5yr warrenty. As Lumens is high for Syska then Arraystrom then Osram.
    Need gud quality and life.

    • Abhishek Jain

      Hello,

      Osram is known as the best technology brand for LEDs. So even though the warranty is less, the chances of it working long is more. My next choice would be a brand offering the longest warranty.

  • Rakesh

    Getting a Lot of Information regarding how to save electricity by choosing right products, thanks for sharing.

    Hi, I am Rakesh from Durgapur, West Bengal. Recently we bought a 3 BHK flat of 935 Sqft of carpet area so I want to select proper lights, Fans and other electrical appliances like AC,Geysers,Chimneys and all so that we can save Electricity and of course the Electricity Bill.

    I am providing the dimension of the flat??

    Living/Dining ? 15.6? X 16.4? , Master Bedroom ? 12? X 12? , Balcony (attached) ? 10? X 4? , 2nd Bedroom ? 10.4? X 12? , 3rd Bedroom ? 12? X 10? , Kitchen ? 10.4? X 6? , Toilet ? 12? X 4.10? , Toilet (attached) ? 4.7? X 8.2?

    The Builder is providing MCB for Individual flats but I want to install RCCB for mine, so can you tell me what mA of RCCB would be appropriate for my home.

    Our flat is on 7th Floor. We already have a 160 liters BEE 3 star rated Godrej Fridge, A 20 ?? Sony Wega TV , A Samsung Fully Automatic Top Load Washing Machine ,A 15.6?? Laptop.

    Please Guide me

    • Abhishek Jain

      Hello Mr Rakesh,

      What kind of lighting are you planning to put in the rooms? If you are looking for regular tubelights then you can go for T5 tubelights. Living/Dining can have 2 T5 (28 Watts) tubelights, Master Bedroom can have 1, Second and third bedroom can also have one each, and in the kitchen you can put two 7 watt LEDs (you can get philips LEDs on ecommerce sites) or 10 Watt CFLs. For toilet 1 you can go for a 2 ft (14 W T5 tubelight) and for toilet 2 you can go for 1 ft (8W T5 tubelight). Now this is very simple lighting for high energy saving. But if you are looking for fancy lighting then the solution would be different.

      As for Fans, you would need 2 fans for Living/Dining room and 1 for each of the bedrooms. If your usage of any of the fans will be high then you can consider going for energy efficient ceiling fans like Superfan, Havells Fusion-50 or ES 5 star, Orient SUMMER CROWN or Energy Star, Usha TECHNIX FLAIR, Crompton Greves HS PLUS.

      Which all rooms do you plan to put ACs? and what will be the usage of these ACs in hrs? Also is 7th floor top floor?

      Sizing of geysers will depend on the kind of usage. Will people be using them for shower bath or bucket bath?

      For RCCB: We recommend all houses to put RCCB in their houses. The size will depend on number and kind of appliances (which will provide total current that RCCB should be able to handle) and sensitivity that you want it to have to current leakage. The rated current value of RCCB can be similar to the rated current value of the MCB installed in your house. As for sensitivity: a 1-10 mAmp current leakage can just cause pricking sensation and will not be life threatening. But current leakage of 500 mA can be life threatening. This link can show you what kind of impact leakage of current can have: http://www.havells.com/Admin/SiteMedia/Products/ProductImages/Rccb%20Table.png please note a low value as 1-10 Amp can also cause frequent tripping if the wiring in your house are faulty.

    • Rakesh

      Thank you very much for the reply

      I planned for simple lighting to save more electricity, I think your suggestion is appropriate according to my need.

      For Fans how is the service network of Super Fans? I know I can buy Super Fan on-line from their website, but how is the after sales service network?

      As for the Geysers, we are family of 4 Persons, no kids. In Durgapur the minimum temperature in winter drops to 6-7 degree Celsius, so we might use the geysers for bucket bath and as well as shower bath.

    • Abhishek Jain

      Hello Mr Rakesh,

      Superfan does not have a large sales/service network as they are a new company. But they do provide support on phone and if they are not able to solve it on phone they replace the machine. But if you find it a hassle then you can go for Havells Fusion-50 fan.

      You should go for 15 lts water heater, you can look at these:

      Havells QUATRO 15
      AO Smith HSE-VAS-015
      Havells PURO 15
      Bajaj Majesty 15 GPU
      Racold Eterno dg 15 lts water heater.

    • Rakesh

      One more thing I forgot to ask about lights, are there any specific brand to look for while buying T5 tube lights and how much will it cost?

    • Abhishek Jain

      You can look for Osram or Havells T5 tubelights. They are quite good. Philips also has T5 tubelights. Try to look for one with metallic frame (because plastic frames do not last long and then it becomes unnecessarily expensive to change frame everytime). Initially the set (with frame) would cost about Rs 600 (for 4 ft tube), but replacement tube (after 3-4 years) would cost about Rs 120-150.

  • Alik Ban

    I am interested in buying LED yellow light bulbs that go in standard pin and screw holders. The wattage is 7 to 14 watts.

  • N K Ramakrishnan

    Surya electronic ballast tube not comes on when switched on. Later comes on automatically. Why so ?

    • Abhishek Jain

      Seems like a problem with the ballast. Electronic ballast switch on automatically.

  • Amy

    yeah,LED lights save more energy and last long. Want quality LED lights, feel free to contact me, pls

  • SK Sharma

    Do we get cfl / led tube lights in India . If so, what are the prices

    • Abhishek Jain

      There is no difference between regular tubelight and CFL, as both use the florescent tube technology. LED tubelights are there.

      Regards,
      Abhishek

    • imran

      hi, i have constructed new house wanna put good quality fan and lights please suggest me which company shall i prefer for fan usha or crompton greaves and for fluorescent bulbs wipro or philips brand, please suggest.

    • Abhishek Jain

      Hi Imran,

      All the brands that you have listed are good and top brands. It is better to compare various models rather than compare top brands.

    • Amy

      Hi, imran,do you still want quality lights?email me pls:[email protected] Skype: yicai-sales003

  • neeta

    Hi, I live in a Govt quarters. Usually when a room is not used, we switch off the tubelights and switch it on when we require it. It happens quiet a few times in a day. I get a electricity bill of Rs.1600 and above inspite of not using AC, geyser, water purifier. My use of microwave is just restricted to just 2-3 times a month, so not more than half an hour in total. The washing machine, fridge, mixer, 4 tubelights, 3 CFL lights, TV (for 3-4 hours a day) and the computer (1 hour a day) are used on an everyday basis. My previous residence inspite of using AC, geyser, water purifier as well as all the other household items, the amount of bill justified the usage. I have a feeling that I am charged wrongly. Am I right? Can I go ahead with a complaint to the electricity department. Or is there anything wrong in the way we use it? kindly guide

    • Abhishek Jain

      Hi Neeta,

      Which city do you live in? Also how long do you use various appliances in a day? And finally what size fridge do you have?

      Regards,
      Abhishek

  • dvsquare

    Hi, I have a living room 12*16, our interior designer has already made a provision for 2 strip lights on the opposite sides on the false ceilings.
    Apart from that, both the false ceilings (1.5 ft wide), have provision of 3 each (total 6) LED lights, and have been told to buy 5W warm white light for them, total of 6 * 5W warm white for our living. I wanted to ask whether 6 warm white LED lights of 5 or 6 W will be good enough for illumination ? Will that be good enough for occasional reading?

    • Abhishek Jain

      Hi, Do you have more details mentioned on the LED lights? As in how many “Lumens” does it generate? Lumens is the measure of brightness as opposed to watts. Having said that 6 lights of 6 Watts means 36 watts of lighting. Even if the LED bulbs are as good as fluorescent lamps (CFLs) in terms of brightness, it should be good enough for the room size you have mentioned (unless you like your room to be very bright).

      Regards,
      Abhishek

    • dvsquare

      Thanks for your reply.
      No, I don’t have much details, I have to go and buy now. So, I wanted to know what to keep in mind while buying.
      Since, its a living room, suggested is “Warm White” light, 6 numbers of 5-6 watts each. We don’t want very very light room, but it should be good enough for a living room ambience, and should not create problem in occasional newspaper etc reading.
      Also, do you have any suggestion on which brand to buy for these paneling lights?
      In market, the brands are too many and most of them are unheard of, so its difficult to make decisions. Sometimes, wipro or philips doesn’t make all type of lights and sometimes all the shopkeepers doesn’t keep them.
      Thanks again for your reply.

    • Abhishek Jain

      Hi,

      I would suggest you to look at the lumens of the bulbs. Lumens represent the brightness. For your size of room you would need about total of 4500-5000 lumens (please refer: https://www.bijlibachao.com/Lights/how-much-lighting-is-good-lighting-for-a-room.html). This is the brightness that you can get from 2 regular tubelights. And 2 tubelights will be more than enough for you to do reading occasionally. Now ideally equivalent LED wattage (combined) to get brightness of that amount should be about 40-45 watts (in total). But I would suggest that you look at the lumens when you buy a LED bulb. Also do read this as well: https://www.bijlibachao.com/Lights/led-light-bulbs-buying-guide.html.

      Manufacturers like Phillips and Havells do make LED lights and you can check their websites to find out more. I would not recommend you going for unbranded LEDs or lesser known brands unless you have received recommendation for a specific brand from someone known. There are lot of cheap and bad LEDs in market that do not last long. The biggest benefit of LEDs (as compared to fluorescent lights) is its life. And if they do not last long then it is better to go for CFLs or fluorescent lights. Or else you should have a return warranty for at least 10 years on the product. So lumens and warranty are something that you should definitely look for.

      Hope this helps.

      Regards,
      Abhishek

    • dvsquare

      Great, thanks abhishek.
      I got the lumen thing, so basically I need to check for around 700 – 750 lumens per LED panel light (total 6 LEDs).
      I will check that and not only the wattage.
      And in our bedroom, which is equally big, in the false ceiling, the space for 2 lights are given, and being suggested to buy 2 LED lights, each of 15 W, and of “white light”.
      And I will remember to buy branded ones like philips or wipro or havells, depending on the budget, because most of the lesser known brands come with 2 year warranty, but then we are looking for a lifetime of 10 years atleast.
      Also, what about spot lights 1w, any specific brand there ?
      Similarly in case of strip lights also, I am confused, as which brand to go for.

    • Abhishek Jain

      If we compare products in terms of lumens output, LEDs luminaries that have wider angles (or that are not spot lights) do not have much benefit over fluorescent bulbs/tubes. The wider the angle at which an LED luminaire delivers light, lower is its efficiency in lumens/watt. Their major benefit is that a CFL may last just for a year or two but a LED bulb may last for 10-15 years. On top of it CFLs are harmful for environment while LEDs are not. Ideally LEDs are like put it and forget it. But cheaper LEDs available in the market have bad circuit designs that fail early. So buying the right one is most important. The only brands that I am aware of are the bigger ones. So I may not be able to help you on that.

      As far as Spot lighting is concerned, nothing can beat LEDs in terms of efficiency. 1W of spot lighting would be far efficient that any other spot lighting options available in the market. So you will surely get more value for your money with LED spot lights.

    • dvsquare

      Thanks Abhishek for lot of useful info.

    • dvsquare

      Hi Abhishek,
      One more query about the spotlights.
      Today, when I went to purchase the spot lights, I opted the philips one and but they were 2W, even wipro ‘garnet’ was 2W, but other indian brand called pasolite and another one was 1 W.
      And for that shopkeeper told that, LED is 1W only and 1W is wasted in driver, which happens in other brands also, but philips & wipro write full 2W on their box.
      Was he correct in this explanation?
      I seemed to believe in his saying and opted for 2 W philips LED spot light.

    • Abhishek Jain

      Ideally the power rating of the bulb should be the total power consumption of the assembly. It is strange if it is not the same. But I think it is better that you opted for philips.

  • rakesh reddy

    in my study room which bulb is more efficient(bright) whether cfl or t5 tube lights

    • Abhishek Jain

      Hello Rakesh,

      In general T5 tubelight gives more brightness per watt of energy. You can even use a 2 Ft T5 tubelight which is 14 watt if you want to illuminate the whole room (based on the size of room). Smaller wattages can be used if you use table lamps while working. It will depend on what is comfortable for you.

  • Rahul

    Hi,

    The above article is very helpful. However now i am a bit confussed. Let me tell you the history.
    In my flat the living room size is 17 feet x 11 feet. I have made a false ceiling in the room and have also made provision for LED STRIP which will run to about 40 feet in rectangle shape in the room. I have also made 6 holes of 7 inch x 7 inch for the light fittings. I was planning to install CFLs as people told me it saves electricity. (But frankly i am not very satisfied with the CFL light as it looks very dim compared to our traditional TUBE LIGHT.)

    My Queries.
    1. How much lumens light is required for such room.
    2. If i have to install LED Fittings, then how many LED fittings and of what Wattage should be installed.
    3. If I have to istall CFL, then how many and of what wattage should be installed.
    3. How much would I save if i install TUBE LIGHT or CFL or LED fitting

    Thanks,
    Rahul.

    • Abhishek Jain

      Hi Rahul,

      A 17 feet by 11 feet room would need about 4500 lumens in total. Which can be achieved by putting 2 tubelights (best option is slim T5 tubelights of 28 W each). Or if you want to put 6 CFLs then 6 CFLs of 15 – 18 W each would work. Certainly if you put all the lights “on” then 2 T5 tubelights would be more economical as it will just consume 56 Watts in total. But if you put 6 CFLs then it can be more controlled in such a way that you can put one switch for 2 CFLs and when required you put on only 2 or 4 or all 6. But that will be beneficial only if you feel that you are working in particular area of the room and lighting only that portion is sufficient. So CFLs will give you more control and saving in case you do not want the whole room to be lighted. But if you like the whole room to be lit well, then I would suggest you to go for energy efficient T5 tubelights (2 of them). Cost wise both the options may turn out to be same but you will save 6 units a month (if used for 6 hours every day) if you use T5 (and use all the lights all the time).

      In case you are thinking of LED, then LED downlighters will be the best. The wattage required will be slightly more than tubelights and it will be much more costlier as well. So the best idea would be to use 2 T5 (energy efficient) tubelights. You just have to be a little creative to use it on a false ceiling so that you do not obstruct the light coming from the tubelights. Using white reflective surfaces can help.

      Regards,
      Abhishek

  • prasanna

    led is nice… but is it possible to get the leds in the size of tubelights?

    • Abhishek Jain

      Hi Prasanna,

      Certainly there are LED tubelights available in the market. You can find them on some of the ecommerce portals if you search on internet. If you are really interested in discussing about them, you can drop me an email at [email protected] and we can discuss more.

      Regards,
      Abhishek

  • BHOMA RAM NAI

    DESH- DUNIYA KI TARRAKI KE LIYE JO KAAM VAIGYANIKO NE OORJA (BIJLI) BACHANE KE ANEK SADHAN BANAKAR KIYA HAI UNSE BHI BARA KAAM HAM UN SADHNO KA ISTEMAL KARKE KAR SAKTE HAI AGAR PRAKASH KE LIYE SABHI LOG LED LIGHT KA PRAYOG KARNE LAGEN TO BIJLI KI VATMAN SE 80% KHAPAT GHAT JAYEGI YANI BIJLI KI ATAM NIRBHATA………JAI BHARAT BHOMA RAM NAI BAPEU (BIKANER RAJASTHAN SE)

  • SHER SINGH THAKUR

    our one unit saving of power in north can save a life of patient in south who may be on the operation theatre & due to this one unit saving in north grid failure could be avoided in south,am I wrong——THINK-THINK–THINK

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