How to replace 40W fluorescent with 15W LED tube light T8

The calculation that 15W LED tube light T8 replace 40W fluorescent

We already know that:


1, ordinary fluorescent tubes emit the light in all directions, wasting nearly 50% of luminous flux, while the LED tube light emit light at 120 degree light, only 60% of the the fluorescent lamps using the Lamp panel actually to reflect effect is valid, the rest are wastage.

2, there is theoretically no light decay in three years for the LED tube light, there is mostly up to 70% light decay in five years,, and light decay of the ordinary fluorescent reaches about 80% in three years, which is that 20% of the flux lost.

3, the actual wattage of 40 W is 36W fluorescent instead of the standard 40-watt, we collectively call that the 36W fluorescent lamp is 40W

4, the light efficiency of the fluorescent tube is generally 60 ~ 70Lm / W, but many lamps are actually not. Here we take the 80LM / W for example.

So we get the following conclusions:

LED 15W * 80LM / W = 1200LM (Luminous Flux)

LED 15W * 90LM / W = 1350LM (Luminous Flux)

LED 15W * 100LM / W = 1500LM (Luminous Flux)

Fluorescent 36W * 80LM / W = 2880LM 2880LM * 60% (light loss) = 1728LM      1728LM * 80% (lumen) = 1382LM (actual flux)

the overall brightness of 36W fluorescent lamp is actually 1382LM

Several formulas can be seen from the above, what is completely satisfied that 15W LED tube instead of T8 40W ordinary fluorescent lamp, let alone LED tube light that is of 100LM / W high light efficiency.

Nowadays,the LED flood lamps and LED tube light are the most widely used as the representatives of the decorative lighting and the home lighting in daily life,the LED tube light enjoys a great popularity in our corridor, restaurants, shopping, leisure and entertainment, galleries, exhibition halls and other indoor environments everywhere, the LED flood lamps is mainly used in city squares, parks, stadiums, the facades of large commercial buildings and hotel, stage, waiting rooms, airports etc. where the higher brightness is needed to illuminate,meanwhile,there a large number of factory engaging in developing and producing the LED light,Lead Lighting is just one of them,which adopts high brightness SMD as the light source of the LED tube and highly integrated and high brightness COB as the light source of the LED flood lamps so that fully guaranteed stable and soft light of the LED tube light and octahedron breadth and brightness irradiation range of the LED floodlight, while low voltage constant current driver ensure the AC can be converted into the DC to improve energy efficiency of the LED tube light and LED flood lamps and reduce the waste heat energy and stroboscopic effect exciting the human eye, the most important is that the LED lighting without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is Known as energy-saving and environmental protection. Login to learn more features and uses of the LED tube light and surf  to know more awesome LED floodlights and other LED lighting.

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2 thoughts on “How to replace 40W fluorescent with 15W LED tube light T8

  1. Pingback: Fluorescent rabies virus tracks how experience alters neural circuits | All decorative lighting

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