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Watts chart

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DanteCBR

Apr 25, 2012
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Does anyone have a chart for LED watts to actual watt usage..

I know that a 900watt LED lamp is around 385w in usage..

Does any one have a chart or could even explain how 900w can be 385w.. I thought a watt was a watt..
 

Arouse1973

Adam
Dec 18, 2013
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Hello. Watts is Watts. It energy used per second. Where did you get the two Watt figures from?
Adam
 

Anon_LG

Jun 24, 2014
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Do you mean the conversion ratio of input electrical power to useful light output power? See here. Scroll to led. Your light is apparently the theoretical maximum operating efficiency of LEDs! (~43%)

But this may not be what you are looking for.
 

davenn

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Sep 5, 2009
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I suspect the OP doesnt understand they are referring to the incandescent lamp compared to a LED

so ... the light output from a 385W LED lamp is equiv to a 900W incandescent lamp

same thing with compact fluoro's compared to incandescent lamps


so it's the equiv light output NOT power used


Dave
 

DanteCBR

Apr 25, 2012
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Has Dave said, that could be the issue, i must be missing something..

I have a friend who likes to smoke a bit of wacky backy (and it genuinely is a friend, i dont even drink alcohol, let alone smoke weed). After a few years of buying dodgy stuff from dealers, he decided to grow his own. (Only 2 plants). He's using CFL lamps at the moment but wants to go to LED to save on electricty (light and ventilation).

He shown me on the forum that whats advertised as a 900w LED lamp actually uses near 400watts in electric
 
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