Offroad light amperage question?? - Ford Powerstroke Diesel Forum
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post #1 of 10 Old 06-24-2013, 05:43 PM Thread Starter
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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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2000 7.3l f350 4x4 cclb psd. 4r100 trans.Ranchhand everything! 6637 intake, zoodad mod, custom big rig runnin lights, ccv mod, RR boots and plenum inserts, foil delete, EV2 gauges, edge cts, tuff country 2.5" leveling kit, X codes, 315/75r16 coopers, 08 mirrors, 6.0 trans cooler, tgc dual steering stabilizer, fabtech adj. trac bar, mbrp 5" turbo back straight pipe with 8" tip, php 6pos, ssbc brakes, ebpv delete, cat elc 100,xxx
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post #2 of 10 Old 06-24-2013, 06:03 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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post #3 of 10 Old 06-24-2013, 07:15 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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post #4 of 10 Old 06-24-2013, 07:39 PM Thread Starter
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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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2000 7.3l f350 4x4 cclb psd. 4r100 trans.Ranchhand everything! 6637 intake, zoodad mod, custom big rig runnin lights, ccv mod, RR boots and plenum inserts, foil delete, EV2 gauges, edge cts, tuff country 2.5" leveling kit, X codes, 315/75r16 coopers, 08 mirrors, 6.0 trans cooler, tgc dual steering stabilizer, fabtech adj. trac bar, mbrp 5" turbo back straight pipe with 8" tip, php 6pos, ssbc brakes, ebpv delete, cat elc 100,xxx
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post #5 of 10 Old 06-24-2013, 07:44 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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post #6 of 10 Old 06-24-2013, 07:56 PM Thread Starter
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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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2000 7.3l f350 4x4 cclb psd. 4r100 trans.Ranchhand everything! 6637 intake, zoodad mod, custom big rig runnin lights, ccv mod, RR boots and plenum inserts, foil delete, EV2 gauges, edge cts, tuff country 2.5" leveling kit, X codes, 315/75r16 coopers, 08 mirrors, 6.0 trans cooler, tgc dual steering stabilizer, fabtech adj. trac bar, mbrp 5" turbo back straight pipe with 8" tip, php 6pos, ssbc brakes, ebpv delete, cat elc 100,xxx
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post #7 of 10 Old 06-25-2013, 09:54 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


E99 F350 Ext. cab Long bed, single wheel 2x4
Riff Raff 6637 intake, FRX and HPX,
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post #8 of 10 Old 06-26-2013, 02:52 PM
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$5000 in lighting for nine of those suckers!

'06 F250 FX4 6.0L/auto-studded, O-ring'd, deleted, turbo'd, inject'd, lifted.... typical bolt on
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post #9 of 10 Old 06-26-2013, 06:32 PM
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Oh wow I never looked at the price, lol! Sorry guys scrub that thought! Haha


E99 F350 Ext. cab Long bed, single wheel 2x4
Riff Raff 6637 intake, FRX and HPX,
Dieselsite boostfooler, factory tech valvebody, filter system,
Local custom trans build - BTS in near future,
Derale cooling pan and trans cooler,
Mbrp 4" turbo back
Ts 6 pos chip - TW tunes coming soon,
Guzzles hutch and harpoon mod with lift pump and racor filters
Ww2
Blank pedestal with moded exhaust port
Afe rear end cover
Callahan drilled and slotted rotors front and rear
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post #10 of 10 Old 06-27-2013, 11:15 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

2000 Ford F-250, Crew Cab Long Bed 4x4, Automatic Transmission, Ts 6 Position, 4" MBRP Exhaust, DIY Intake, Pillar Guages, CCV Mod
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