how many amps for a 400 watt light

videoman40

Well-Known Member

Jan 16, 2007

• #1

how many amps does a 400 watt light use, the reason I am asking I was wondering if I could place two on a typical 110 volt outlet, which is usually like 15 amps I believe?
Peace!

 

dursky

Well-Known Member

Jan 16, 2007

• #2

good question

 

MightyBuddha

Well-Known Member

Jan 16, 2007

• #3

Don't quote me but I think I read somewhere that a 400W lamp uses like 7.5 amps.

 

le1337need

Well-Known Member

Jan 16, 2007

• #4

wouldn't the ballast say how many it uses?

 

potroast

Uses the Rollitup profile

Jan 17, 2007

• #5

The formula is Amps = watts / volts.

So your 400w lamp, plus 100w for the ballast totals 500w / 110v = 4.55 amps.

You could put 2 on a 15 amp circuit, and have several amps to use for fans.

HTH

 

videoman40

Well-Known Member

Jan 17, 2007

• #6

Onece again, thanks potroast!

 

nongreenthumb

Well-Known Member

Jan 17, 2007

• #7

you can get a six socket relay to power upto 6 600w lighting combos, this is 23 amps.

 

Ar1$t[]cr@t$

Active Member

Jan 17, 2007

• #8

but remeber thats max wattage 400 it wil only use that on startup then it will drop down to like 220watts so it will be even using lets amperage so no worries..late ar1