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KC daylighters.. whats to much ?? #4677547
02/25/18 11:02 AM
02/25/18 11:02 AM
Joined: Jun 2009
Posts: 3,247
Indiana
OtisBlkR1 Offline OP
OtisBlkR1  Offline OP
Joined: Jun 2009
Posts: 3,247
Indiana
I currently have two 100watt 6inch KC (pencil beam) daylighters on the front of my 5.3ltr Silverado. 10 years ago I installed the lights and have been very happy with the performance in off road use. I recently was given another pair of the same identical lights and have already installed the lights on my brush guard (looks sweet) however I didn't get any wiring.. my questions are..

#1 the power draw, with the truck running and I activate the lights, you can very clearly see the power draw on the the trucks battery gauge move up slightly with two lights powered up, the alternator is clearly working harder.. when I do use these lights its never for an extended period of time, two to 3 minutes tops usually. will I overstress the alternator and potentially burn it up with running 2 sets of these lights (4 total 100 watt fixtures) ? I have nothing else aftermarket on my truck other than a trailer brake controller.

#2 wiring. I have been on KC's website and to order the wiring kit its approx. $45.00 before shipping, this includes switch, relay, fuse holder, double leads for both fixtures and wireloom and hardware. I have ordered and used with great success LED lightbar wire harnesses from Amazon. 30/40AMP 12V relays etc.. I know the KC'S draw more power, however to my untrained eye I think I could get away with using the significantly less expensive kits sold on amazon, However im not 100% on the guage wire.. Has anyone tried these kits on higher draw lights ? I don't want to start melting wire/burn down my truck..


06 Silverado 92,xxx Mobil 5-30
11 Honda Accord 38,xxx Mobil 1
06 Milan 69,000 Mobil 1
12 Ranger 800XP & 14 TRX 450R

Re: KC daylighters.. whats to much ?? [Re: OtisBlkR1] #4677569
02/25/18 11:14 AM
02/25/18 11:14 AM
Joined: Feb 2009
Posts: 1,589
wv
krismoriah72 Offline
krismoriah72  Offline
Joined: Feb 2009
Posts: 1,589
wv
Sell them and use that money towards LED versions..less power draw/better light.

Re: KC daylighters.. whats to much ?? [Re: OtisBlkR1] #4677577
02/25/18 11:18 AM
02/25/18 11:18 AM
Joined: Jun 2003
Posts: 17,841
Deplorable in apple valley, ca
Chris142 Online content
Chris142  Online Content
Joined: Jun 2003
Posts: 17,841
Deplorable in apple valley, ca
Each light uses about 8 amps. So about 32a for all 4. Quite a draw. How many amps can your alternator put out?

Honestly I would either find LED bulbs for the lights or buy a LED light bar. They don't nearly use as much currant as the old kc bulbs do and are brighter.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
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Re: KC daylighters.. whats to much ?? [Re: Chris142] #4677582
02/25/18 11:24 AM
02/25/18 11:24 AM
Joined: Jun 2009
Posts: 3,247
Indiana
OtisBlkR1 Offline OP
OtisBlkR1  Offline OP
Joined: Jun 2009
Posts: 3,247
Indiana
its about the look, those pretty chrome housing units look good on the truck, Im liking your idea of replacing the bulb with LED.. I have used many LED bars and pods on various ATV's and side by sides. Im going to look further into the bulb/LED replacement idea.. thank you


06 Silverado 92,xxx Mobil 5-30
11 Honda Accord 38,xxx Mobil 1
06 Milan 69,000 Mobil 1
12 Ranger 800XP & 14 TRX 450R

Re: KC daylighters.. whats to much ?? [Re: OtisBlkR1] #4677608
02/25/18 11:51 AM
02/25/18 11:51 AM
Joined: Mar 2009
Posts: 2,680
Cedarbrae, Ontario
xxch4osxx Offline
xxch4osxx  Offline
Joined: Mar 2009
Posts: 2,680
Cedarbrae, Ontario
With all the better and more efficient LED off road lights available today, I wouldn't bother with those halogen lights. I had a friend who years ago bought 2 of those 100watt KC lights and installed them on his new truck. I told him not to leave them on if he was just idling because of the draw on the alternator. You could hear the alternator really whine when you turned those lights on. It wasn't long before he was replacing the alternator, which I'm sure was because he didn't listen to me about shutting them off when he was idling.

Last edited by xxch4osxx; 02/25/18 11:52 AM.

2015 RAM SXT Crew Cab 5.7 with 6 speed tranny.

2008 Mazda 3 GS Sport Hatchback 5sp MT (Girlfriend's car)

Re: KC daylighters.. whats to much ?? [Re: krismoriah72] #4677631
02/25/18 12:22 PM
02/25/18 12:22 PM
Joined: Jun 2012
Posts: 1,764
USA
oldhp Offline
oldhp  Offline
Joined: Jun 2012
Posts: 1,764
USA
[quote=krismoriah72]Sell them and use that money towards LED versions..less power draw/better light.

^^^^^^^^^^^^This^^^^^^^^^^^^^


2018 RAM 1500 3.6/8 speed.
2017 Jeep Sahara Unlimited 3.6
"U kan't fixe it......if'n it ain't broke."
Re: KC daylighters.. whats to much ?? [Re: OtisBlkR1] #4677675
02/25/18 01:13 PM
02/25/18 01:13 PM
Joined: Feb 2003
Posts: 7,702
Jupiter, Florida
Cujet Online content
Cujet  Online Content
Joined: Feb 2003
Posts: 7,702
Jupiter, Florida
The amp draw is no problem for any modern vehicle. The battery can provide any additional power for a period of time too.


People who count on their fingers should maintain a discreet silence.
Re: KC daylighters.. whats to much ?? [Re: OtisBlkR1] #4677700
02/25/18 01:42 PM
02/25/18 01:42 PM
Joined: Dec 2016
Posts: 7,199
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,199
Waco, TX
Originally Posted By: OtisBlkR1
I don't want to start melting wire/burn down my truck.


Then get rid of the KC's and start using high brightness LED's, which use a LOT less power.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: KC daylighters.. whats to much ?? [Re: OtisBlkR1] #4678943
02/26/18 04:45 PM
02/26/18 04:45 PM
Joined: Aug 2013
Posts: 49
Upstate NY
Fred_Garvin Offline
Fred_Garvin  Offline
Joined: Aug 2013
Posts: 49
Upstate NY
Actually it would take a standard 40" LED light bar to equal the output of one 100w 6" halogen Daylighter. Unless you go with a pro type LED setup which can cost 3 times or more than the day lighter and current draw can easily exceed the halogen.
I also prefer the color of halogen lights to the LEDs.

Re: KC daylighters.. whats to much ?? [Re: OtisBlkR1] #4682972
03/03/18 07:15 AM
03/03/18 07:15 AM
Joined: Jun 2009
Posts: 3,247
Indiana
OtisBlkR1 Offline OP
OtisBlkR1  Offline OP
Joined: Jun 2009
Posts: 3,247
Indiana
I have, and have installed a dozen LED light bars, up to 50 inch. Clearly I like them, However at the price point I haven't used anything that competes with a pencil beam KC for reaching out 400-500 yards and spotlighting. Up close like 200 yards or less I very much like using LED bars. I did look into retrofitting LED's into my KC housing units.. that's about mission impossible for my skill set. I had a 32 inch bar on the front of the truck for a short time, it was half spot and half flood. It was great for cruising gravel roads.. It simply doesn't reach out.. If money was no object, Id have 4 HID spot lights on my truck, However I only use My KC's once in a great while and at the much higher price point of HID its simply overkill for my occasional needs.


06 Silverado 92,xxx Mobil 5-30
11 Honda Accord 38,xxx Mobil 1
06 Milan 69,000 Mobil 1
12 Ranger 800XP & 14 TRX 450R

Re: KC daylighters.. whats to much ?? [Re: Linctex] #4682975
03/03/18 07:19 AM
03/03/18 07:19 AM
Joined: Jun 2009
Posts: 3,247
Indiana
OtisBlkR1 Offline OP
OtisBlkR1  Offline OP
Joined: Jun 2009
Posts: 3,247
Indiana
as long as I can safely use all four KC'S I am very happy with the output, I see no reason to get rid of what I already have.


Originally Posted By: Linctex
Originally Posted By: OtisBlkR1
I don't want to start melting wire/burn down my truck.


Then get rid of the KC's and start using high brightness LED's, which use a LOT less power.


06 Silverado 92,xxx Mobil 5-30
11 Honda Accord 38,xxx Mobil 1
06 Milan 69,000 Mobil 1
12 Ranger 800XP & 14 TRX 450R

Re: KC daylighters.. whats to much ?? [Re: OtisBlkR1] #4683838
03/04/18 08:02 AM
03/04/18 08:02 AM
Joined: Jun 2009
Posts: 3,247
Indiana
OtisBlkR1 Offline OP
OtisBlkR1  Offline OP
Joined: Jun 2009
Posts: 3,247
Indiana
so I did the install last night, two independent sets of wiring, two relays. It works very well. man oh man, it sure is bright... the pull on the system seems to be fine. by my naked eye the battery gauge doesn't seem to be moving any more or less than before when its all turned on.


06 Silverado 92,xxx Mobil 5-30
11 Honda Accord 38,xxx Mobil 1
06 Milan 69,000 Mobil 1
12 Ranger 800XP & 14 TRX 450R

Re: KC daylighters.. whats to much ?? [Re: OtisBlkR1] #4686090
03/06/18 10:06 AM
03/06/18 10:06 AM
Joined: Feb 2007
Posts: 3,704
Southeast
meep Offline
meep  Offline
Joined: Feb 2007
Posts: 3,704
Southeast
good for you! How did we live before LEDs? Color Rendering is still a much safer bet with halogen, and LED longevity is questionable for a lot of the 3rd party products. I've run several LED fixtures overnight when trailer camping and they can mysteriously quit long before the "100,000" hour LED lifespan. I've had some quit as early as within 40 hours of run time.


2018 F150
2015 crv (wifey!)

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