Replacing fluorescent lamps with LED T8 lights

Our office currently runs standard fluorescent strip lights (1500mm T8 tubes) throughout, with over 60 bulbs across 3 floors. We are considering upgrading all the lights to LED bulbs, in order to save power and to make them compatible with an office automation system (to turn them on and off automatically).

Energy savings

So, how much energy will they save? Well a standard fluorescent bulb consumes about 58w, whereas the new LED bulbs consume around 20W. Therefore over the course of a year I would anticipate the energy savings to be as follows:

  Standard Fluorescent Bulb LED Bulb
Power Consumption 58 Watts 20 Watts
Hours in use 10 hours per day, 5 days a week, 52 per year
Hours per year 2,600
Kilowatt hours per year (watts / 1000 * hours) 150.80 kWh 52 kWh
Cost per year (at 10p per kWh) £15.08 £5.20

Thus the saving is about £10 per year per bulb.

We are currently asking suppliers to quote us for 60 bulbs, and the prices we have received so far range between £25 to £60 per bulb.

The bulbs are rated for about 50,000 hours of constant usage, which should mean they would last nearly 20 years at the rate of usage we have forecast.

Standard bulbs last about 5,000 hours (2 years) and cost around £2 each.

It looks like the energy saving bulbs should pay for themselves after 3 – 5 years, and return a yield of around 20% thereafter.

Things I haven’t factored in:

  • Cost of installation / replacing bulbs (slighty more difficult to initially install, but they last 10 times as long and therefore need less labour to replace).
  • Reduced heat from operation – might require less air conditioning in summer months)

129 thoughts on “Replacing fluorescent lamps with LED T8 lights”

  1. Huayuan Lighting Co., Ltd is a high-tech company engaged in scientific researching, manufacturing, marketing, technical support and service of LED ceiling light,LED lights,LED bulbs, LED spotlight ,LED fluorescent tube,LED lighting. We have advanced and professional equipments are utilized to aid LED assemblies of LED strips, array and various luminaire. The equipments include SMT assembly, auto soldering lines, opto-electrical test devices, light and optical distribution analysis devices. We have experienced technicians and salespersons, and We offer customer integrated-service including pre-sale service,after-sale service,technical support and transportation service.

  2. Physical Parameters:
    Overall Size: 15 x 1200mm
    Housing material:6063 Aluminum
    Base material: PC
    IP Rate:IP40
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    Net weight: 0.298kg
    Surface temperaturte:≤45℃
    LED weld point temperature:≤48℃
    Working temperature: -20℃ – 45 ℃
    Storage temperature: -20℃ – 80 ℃
    Storage humidity: 20%~ 80%
    Working humidity: 10%~90%
    Indoor use

    Optical Parameters:
    Output lumens: 1045lm(warm white), 1045lm( neutral white & cool white)
    Color temperature: Warm white(3000-3500K), Daylight white(3500-4500K), Cool white(5500-6500K) options
    Emitting angle: 120 degrees options
    Light source ( LED chips) brand: CREE, Bridgelux, Edison
    Numbers of LEDs: 168 pieces
    Lens type: PMMA Lens
    Color rendering index: 80+(warm white), 70+(daylight white & cool white)
    Illuminance: 313 LX @ 1.0M,110LX @2.0M, 56 LX @3.0M
    Luminous efficacy: 95lm/watt
    Electrical Parameters:
    Working voltage: 85-264Vac/dc
    Frequency: 50-60Hz
    Rated power: 11 watts
    Protection: Input over current protection, Output short circuit protection, Output over current protection
    Pass EMI & LVD testing
    Power factor: 0.9
    Constant current LED driver

  3. good T8 led tube lights article!!we are china led tube light manufacturers factory
    21W T8 LED Tube Light:
    Electrical Parameters:
    Working voltage: 85-264Vac/dc
    Frequency: 50-60Hz
    Rated power: 21watts
    Protection: Input over current protection, Output short circuit protection, Output over current protection
    Pass EMI & LVD testing
    Power factor: 0.9
    Constant current LED driver

    Optical Parameters:
    Output lumens: 1995lm(warm white), 1995lm( neutral white & cool white)
    Color temperature: Warm white(3000-3500K), Daylight white(3500-4500K), Cool white(5500-6500K) options
    Emitting angle: 120 degrees options
    Light source ( LED chips) brand: CREE, Bridgelux, Edison
    Numbers of LEDs: 276 pieces
    Lens type: PMMA Lens
    Color rendering index: 80+(warm white), 70+(daylight white & cool white)
    Illuminance: 500LX @ 1.0M,180LX @2.0M,90LX @3.0M
    Luminous efficacy: 95lm/watt
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  4. Hello All.

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  5. Dear Sir,
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  6. After nearly 4 years of selling LED lighting! Which at times has been hard I can now say the good times are here?
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  7. Dear purchasing manager:
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    Sales Department
    Xiamen Greenlumi Optoelectronics Ltd.
    7/F, Haiyun Building, No.16, Haishan Road, Xiamen, 361013, China.
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  8. Dear Everyone,

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    As you know, LED driver decide the lifespan of led tube. Our company are very strict to LED driver, and the driver was developed and manufactured by ourselves. The patent design meet CUL standard. Two key components: Japan Rubycon Capacitor, 3 Philips IC.

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  9. Dear manager
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  10. There is no doubt that the LED lighting market is growing at a substantial rate, but can you really be sure that the product you are buying is safe and reliable? It is easy to buy direct from Chinese suppliers via the internet at what seems to be at a good price!
    Many suppliers quote 50,000 life span, this is a theoretical life span and without the correct components and quality, it is unlikely that this life cylcle will be acheived.

    With our own office in Guangzhou, China and a number of longer term partners, we have a range of quality products that have all passed independent inspection and carry our own CE Certification. It is worth noting that it is impossible for any Far East manufacturer to offer a CE approval, it is the European Importer that is responsible for such certification.

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  11. Hello, Sir / Madam:

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  12. Our led tube can work with existing starter and inductive ballast.

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    Sales Manager



    Products1:LM79 tested / PSE/CE&ROHS/ ETL&CETL# 4001310 listed Dimmable&Rotatable and
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    Rise-Lite Group Co., Ltd. (Shenzhen Bingxia Technology Co., Ltd.(Chinese name))
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    our led tube can be Withstanding high Voltage,AC1500v for ETL Approved tube,AC3700v for CE Approved led tube.

  13. is a good factory that producing led lighting,such as: led bulbs,led pannel light, led streets light.,led candel light and so will got wholesale price and top quality,welcome inquiry and contact us:
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  14. JDlight (Shenzhen) Technology Co.,ltd is founded in August 2009 and located in Dingfeng Hi-tech Industrial Park, Bao’an district, Shenzhen. It is 20 minutes from the airport by car.JDlights is high-tech enterprise which devoted to high power LED research, manufacturing and selling. Products are exported to over 20 countries in Europe and America.

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  15. Hi, paul,

    Good day!

    We are LED lighting manufacturer,and we have researched & designed some new product.

    If you are interested in, I ‘ll send you our catalogue.

    Thanks for your valuable time.


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    3/F,NO.5 Building,Yangtaishan Industrial Zone,Guantian Community,Shiyan Street,Bao’an District,Shenzhen city, Guang Dong province, China
    Tel: 0755-27626258 Fax: 0755-27626259 SKYPE:sunlightsale08
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  16. Dear Sir or Madam:

    Shenzhen Senruite Technology Co., Ltd., located in Shenzhen of South China – one of the biggest manufacturer base, is an innovative high-tech enterprise with research & development, production and marketing on LED Lighting since 2006 and auto car remote since 2001. For over a decade, we have been insisting the market-oriented, the customer-focused and the quality first as the fundamental. Our R&D specialist, on average over 15 years of experience in the industry, can always develop out new products that actually meet the market requirement ahead.
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    Company name: Shenzhen Senruite Technology co., Ltd
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    Zipcode: 518000
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    Tel: 0086 755 29534848
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  17. Hi, this is Gillian from Shine Technology Limited. We supply high quality led lights(CE RoHS approved with three years warranty), such as led bulbs, led penal lights, led spot lights and together with waterproof led power supplies. If any interest, pricelist is available upon request^ _ ^!


    Shine Technology Ltd
    TEL: 86-755-89335200
    FAX: 86-755-84416990
    Email: [email protected]

    5F/Bldg I, Creative Industrial Park, Bantian,

    Longgang District, Shenzhen City, China
    Zip: 518129

  18. Dear Sir,
    I am lily from xinyang chuangyi electronic technology company, located in Shenzhen, China. Light in the box is our customer and has cooperated with us for 4 years.
    Our main products include:
    Spotlight, ceiling light, down light, LED bulb, LED candle, Flood light, par light, panel light
    Xinyang chuangyi (shenzhen) Electronic technology company ltd
    “Aim to produce and export good quality LED lights world widely”
    Tel: 86-755-28708356
    Email: [email protected]
    Add:Room1505, Unit 8B,Kangqiao Garden, Buji Town,Longgang District,Shenzhen,GD,China.518114

  19. Dear sir or madam,

    This is Steele Dong from Apollux who is manufacturing and exporting LED lights worldwide for 7 years. Main products are Panel Light, Downlight, Flood Light, tubes and bulbs etc. We have CE, Rohs, UL, SAA, SASO certified. The wide voltage transformer enable lamps to be used universal.

    Look forward to your inquiry!
    Steele Dong

    Email: [email protected]
    Tel: 0086 755 23032335

  20. GTD Lighting is a led light manufacturer located in Shenzhen, China.

    The advantages of our company are as follows:
    1.6 years experience in this area, and our boss majors in led shape design and our research departments is made of more than 8-12 years experienced engineers.We have more than 5 engineers.
    2.GTD Lighting is a led driver manufacturer.especially dimmable philips NXP driver.Here is our websites which sell drivers: Our driver got great fame in chinese mainland markets and it also pse, ce, Fcc, Tuv,UL approval.

    For the dimmable products, we use philips NXP IC , rubycon capacitor and Uniohm resistors for the driver. It is ce, rohs, tuv, pse,fcc and ul approval with the pf above 0.9. it is dimmable starting from 0ma-300ma(0-100%dimmable).and for our drivers, we also use Four-layer board instead of two-layers board in the markets which have better heat dissipation. which can make sure the longer lifespan of the driver. It is compatible with a variety of Triac dimmers. such as Lutron, Leviton,Clipsal,Panasonic ,Schneider, Toshiba. and it works well both for Leading and trailing edge dimmers.

    Welcome to visit our websites: or add my skype: gtdlights02 for online service.

  21. Yes,
    Many suppliers quote 50,000 life span, this is a theoretical life span and without the correct components and quality, it is unlikely that this life cylcle will be acheived.
    Thank you so much .

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