How to convert between LED light source wattage and traditional fluorescent lamp wattage?

Conversion: LED conversion efficiency per W = 70-80LM; 8W LED fluorescent tube = 560-600LM or so. General daylight fluorescent lamps per W = 30-40LM, that is to say: 20W fluorescent lamps = 20 * 30 = 600LM.

So: 8W LED lamps are equivalent to 20W ordinary fluorescent lamps.

Wattage can only indicate the power used. Several bulbs with the same wattage have different brightness, but there is no theoretical formula. Incandescent lamps and energy-saving lamps, there are some comparative data, but also all manufacturers write on the package. The usual theory is that LEDs save more power than CFLs at the same brightness.

Extended information:

Basic characteristics of the LED light source

1, light-emitting High efficiency

LED after decades of technological improvements, its luminous efficiency has been greatly improved. Incandescent lamps, tungsten halogen lamp luminous efficiency of 12-24 lumens / watt, fluorescent lamps 50 ~ 70 lumens / watt, sodium lamps 90 ~ 140 lumens / watt, most of the power consumption into heat loss.

LED luminous efficacy after improvement will reach 50 to 200 lumens / watt, and its light monochromatic good, narrow spectrum, without filtering can be directly issued colored visible light. Countries around the world have stepped up to improve the LED luminous efficiency research, in the near future its luminous efficiency will have a greater increase.

2, less power consumption

LED single tube power 0.03 ~ 0.06 watts, using DC drive, single-tube drive voltage 1.5 ~ 3.5 volts, current 15 ~ 18 mA, fast response time, can be operated at high frequencies.

The same lighting effect, power consumption is one ten thousandth of incandescent bulbs, fluorescent tubes, one-half of Japan's estimates, such as the use of light efficiency than fluorescent lamps but also two times the LED replacement of half of Japan's incandescent and fluorescent lamps.

Annual savings equivalent to 6 billion liters of crude oil. On the bridge guardrail lights, for example, the same effect of a fluorescent lamp more than 40 watts, and the use of LED power is only 8 watts each, and can be colorful changes.

3, long service life

The use of electronic light field radiation luminescence, filament luminescence easy to burn, heat deposition, light attenuation and other shortcomings. And the use of LED lights small size, light weight, epoxy resin encapsulation, can withstand high strength mechanical shock and vibration, not easy to break. The average life expectancy of 100,000 hours. LED lamps and lanterns service life of up to 5 to 10 years, you can greatly reduce the maintenance costs of lamps and lanterns, to avoid the pain of changing the light often.

4, safe and reliable

Low heat, no heat radiation, cold light source, can be safe against touch: can accurately control the light pattern and light-emitting angle, the light color is soft, no glare; does not contain mercury, sodium and other substances that may be harmful to health. Built-in microprocessor system can control the luminous intensity, adjust the luminous way, realize the combination of light and art.

5, conducive to environmental protection

LED for the whole solid luminous body, shock resistance, impact resistance is not easy to break, the waste can be recycled, no pollution. The light source is small in size, can be combined at will, easy to develop into a lightweight thin and short small lighting products, but also easy to install and maintain.

Of course, energy saving is the main reason we consider using LED light source, perhaps LED light source is more expensive than traditional light source, but with a year's energy saving to recover the investment in the light source, so as to obtain 4 ~ 9 years in the annual energy saving a few times the net benefit period.

Baidu Encyclopedia - Energy-saving lamps and incandescent lamps

Baidu Encyclopedia - LED light source