What is equivalent lumens of 40 watt incandesent bulb to led light?

Answer 1

Light is a little complicated because various devices for producing it have various efficiencies. Light is measured in lumens. Older incandescent lamps produce 10-15 lumens per watt of electrical power. Halogen lamps produce maybe 20 lumens per watt and lasted much longer. Several years ago the best LEDs were also 20 lumens per watt. Now the best white LEDs are 5 to 10 times better than incandescent lamps, and they last for a decade or more. Expect almost all lamps to be LEDs in the next few years.

Answer 2

What you're asking is not possible. But here's a comparison (need to ask a specific question):

A LUXDOT MR16 LED max power is 6.1 watts, and is spec'd at 210 lumens at 37 degree flood angle, and neutral white coloring. This is a 12 volt light bulb.

You need to understand that LED's are very directionalized, unlike incandecent bulbs, meaning the light they emit is more like a flashlight than the typical overhead light you have in your living room. The more directionalized it is, the more light it will emit at that small area, just like a flashlight. This is the difference between lumens and lux (lux takes in brightness over a specific area, lumens does not).

An SLI incandecent 100 W bulb is rated at 1580 lumens.

So if you want to compare lumens, with no thought of room size, then ~8 of these LED's can provide the equivalent lumens. This may not be equivalent lux, though (I have never seen incandecent bulbs rated in lux).

If you want to look at energy usage, ~16 of these specific LED light bulbs use 100 watts

Answer 3

That is a very good question, so I ended up doing a little research on the internet to find the information. It appears in order to match the intensity of a 100watt light bulb, you'll need 15watts of LED light bulbs.

Answer 4

watt required will be less but you need to measure it intensity wise...

Answer 5

A 100 watt bulb equals zero volts.