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Old 01-13-2014, 11:51 PM   #1
Ajax333333's Avatar
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KC light hook up question... Too much?

Sorry if this is a dumb question.... But trying to learn.

I have a 2007 JKU and currently have 2 55w 6" KC driving lights on the bumper and 2 110w KC long range slim lights on the front bumper grill tube. Someone is giving me 2 55w 5" KC long range lights I would like to mount to the windshield.

I was wondering if that is too much for my battery or alternator? Will I be OK hooking that up? If so should I only run them with the engine on? Or would it be best to not bother with them at all for the stress they may put on the battery or alternator?

Doubt I would ever need them all at once, but would use from time to time. Having the ability to run all at once would be cool though.

Thanks for your help.
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Old 01-15-2014, 10:52 AM   #2
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They won't be too much, but I'd only have them on with the motor running so it doesn't drain your battery. Also, make sure you're using relays (you probably are, just making sure)

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Old 01-15-2014, 10:57 AM   #3
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440 watts total = 36 amps draw. No problem for battery or stock alternator. OK with the engine off for a while, not for hours on end.

Wire them up correctly with realys and appropiate sized wire.
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Old 01-15-2014, 09:38 PM   #4
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Thanks for the info guys. I'm using the relays and wiring that comes with the lights so I should be good there.

Just so I know... Are the amps figured out per watt? I have 440 watts that equal 36 amps. Am I right thinking that each watt equates to 12.2 amps?
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Old 01-15-2014, 09:45 PM   #5
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Old 01-15-2014, 10:51 PM   #6
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Awesome! Thanks. That is why I love this forum. I learn a lot from it.
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Old 01-26-2014, 02:47 AM   #7
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Originally Posted by JLRpslFL View Post
ha, I'm an EE and I've never seen this table as an reference for people not used to Ohms law memorized. I'll definitely be forwarding this to some people when they ask questions from now on. Thanks.
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Old 01-26-2014, 11:55 PM   #8
Knows a couple things...

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EE background here as well and that particular chart is a new one for me too. Pretty handy all-in-1 chart for sure.

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