General Automotive Discussion

light amperage??

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Old

Feb 16, 2004 | 11:21 PM

#1

Doorgunner808

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Tuned

Joined: Nov 2001

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From: Back in Central Texas

light amperage??

How can you tell how many Amps a light such as a headlight or a offroad (KC) light draws?

Thanks in advance,

DG808

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Old

Feb 16, 2004 | 11:25 PM

#2

Mil1ion

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It should say right on it.

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Old

Feb 17, 2004 | 12:57 AM

#3

CowboyBilly9Mile

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From: Eastern WA

And if for some reason it doesn't............power (watts) = voltage X current (amps). Just solve for amps.

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Old

Feb 17, 2004 | 12:41 PM

#4

Doorgunner808

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From: Back in Central Texas

Not all of them Million...Why else would I ask??

So, a 600 watt bulb should draw 50 amps at 12 volts. Right? Gosh I need to get back into school.

Thanks Cowboy

DG808

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Old

Feb 17, 2004 | 09:26 PM

#5

f350xlt460

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Joined: Feb 2003

Posts: 673

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From: Virginia

ohms law buddy

http://www.the12volt.com/ohm/ohmslaw.asp

also, remember, a good charging system on a vehicle should be running at at least 13.5 volts
so, 600/14=about 42 amps...

Last edited by f350xlt460; Feb 17, 2004 at 09:29 PM.

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