it depends, lumens measures light and watts measure power. check out this article; http://wiki.renderplus.com/?title=Lumens_vs_Watts
25
If you have the wattage of the laser you can plug it into a formula X/P=L. Where One lumen is equal to 0.001496 watts (1.496mW) which is Power. X is the number of watts or milliwatt and L is Lumens. So if you have a 1 watt laser you have 668.449 lumens being produced by it.
1000 watts = 1 KW, so: 820 watts = 0.82 KW 0.82 KW * 24 hours = 19.68 KWH
Lumens measures how bright it is, watts measures how much electric power it uses up. An old-type incandescent bulb produces about 10 lumens per watt. A halogen produce about 13 lumens per watt. A fluorescent (energy saving) bulb produces about 50 lumens per watt. LEDs produce somewhere around the same as a fluorescent.
220 lumens is equal to a tungsten incandescent light bulb of 15 watts. Halogen lamp 20 watts. Fluorescent lamp 60 watts. LED lamp 60 watts. high pressure sodium vapour lamp 117 watts. Mercury vapour lamp 50 watts or 17.32 candle power
Normally the watts is a measure of how many watts of electicity a bulb uses, so a 60 watt bulb uses 60 watts. The brightness is measured in lumens, so a 60-watt incandescent blub might produce 600 lumens while a high-efficiency fluorescent blub might produce 3000 lumens.
Watts are a unit of power. So 40 watts of power to an LED are the same as 40 watts of power to a fluorescent. Sometimes LEDs are rated in equivalent watts which is an attempt to relate watts to brightness or lumens. You need to compare lumens and the "temperature" of the bulbs in Kelvin to get the comparison I think you are looking for.
it depends, lumens measures light and watts measure power. check out this article; http://wiki.renderplus.com/?title=Lumens_vs_Watts
Watts and lumens
25
If you have the wattage of the laser you can plug it into a formula X/P=L. Where One lumen is equal to 0.001496 watts (1.496mW) which is Power. X is the number of watts or milliwatt and L is Lumens. So if you have a 1 watt laser you have 668.449 lumens being produced by it.
A 150-watt light bulb uses energy at the rate of 150 watts, when it's turned on.
1000 watts = 1 KW, so: 820 watts = 0.82 KW 0.82 KW * 24 hours = 19.68 KWH
Lumens measures how bright it is, watts measures how much electric power it uses up. An old-type incandescent bulb produces about 10 lumens per watt. A halogen produce about 13 lumens per watt. A fluorescent (energy saving) bulb produces about 50 lumens per watt. LEDs produce somewhere around the same as a fluorescent.
Incandescent bulbs give about 10 lumens of light per watt of electric power Halogens give about 13 lumens per watt CFLs give about 50 lumens per watt So it depends on the type of bulb.
Light bulbs are measured in two ways: Lumens for their light output and Watts for their power consumption.