Offroad light amperage question?? - Ford Powerstroke Diesel Forum
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Old 06-24-2013, 04:43 PM
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Offroad light amperage question??

I'm in the process of installing nine kc 8" 130 watt lights on my truck(2000 7.3l 4x4 cclb). Two driving lights on front bumper along with two spots and then five spots along top of the headache rack. Each light pulls 10.83 amps. So 9x10.83=97.47 amps! Now, I wouldn't have all nine lights on all the time. Just occasionally. When I do have all nine on, what kinda strain is my electrical system gonna be under? Would it be worth it to have a second alternator installed? Thanks
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Old 06-24-2013, 05:03 PM
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Why so many lights? If you need a premium light look into an LED baja bar. You're asking your electrical system to deliver almost 100 amps just for these lights. While the initial cost of LED bars may be expensive, factor in the price of nine halogens and a HD or dual alternators (and little things like 8-6awg wire and 100a relay).
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Old 06-24-2013, 06:15 PM
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i second led light bars but you may prefer the kc look. you will probably need a second alternator plus some big wires and relays. if you decide to put the 5 top lights on one switch you will need at least a 50amp relay and 6awg wire.
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Old 06-24-2013, 06:39 PM
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I prefer the kc look over the led. Ive been lookin at dc high output alternators. Mainly the 270 amp Xp and the 370 amp xp. Both of those put out 200 amps or more at idle. Any opinions on dc?

Just thought of something. Im gonna have all five lights on the headache rack come on at once. So, won't I need a switch that is rated for 50 amps or more??
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Old 06-24-2013, 06:44 PM
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I had 5 of the 130 watt KCs on the roof and 2 PIAAs on the brush guard of my Ranger and never had a power issue. In the 10 years and 90k miles never put an alternator in it either. I had 1 switch turn 3 relays on. So no more than 2 lights on one relay/circuit. I love LEDs but you can't beat the look of a row of KCs across the cab.


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Old 06-24-2013, 06:56 PM
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Quote:
Originally Posted by PowerStrokedRedneck View Post
I had 1 switch turn 3 relays on. So no more than 2 lights on one relay/circuit. I love LEDs but you can't beat the look of a row of KCs across the cab.
Ok I had a brain fart. That's how u do it. How'd I come up with 50 amp switch hahaha
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Old 06-25-2013, 08:54 PM
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Or you could have a look at these.
Lights Lzr Led Lzr 8 Rnd 35w Led KC HiLiTES: Auxiliary Lighting, Off Road Lights, HID Off Road Lights, Fog Lights, LED Light Bars, Driving Lights, Light Bars, Wiring Accessories, Flashlights, Torches
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Old 06-26-2013, 01:52 PM
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$5000 in lighting for nine of those suckers!
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Old 06-26-2013, 05:32 PM
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Oh wow I never looked at the price, lol! Sorry guys scrub that thought! Haha
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Old 06-27-2013, 10:15 AM
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6" Off-Road Light System

I have 4 of these on mine i really like them one day ill convert them to hid
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