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Old 09-27-2013, 06:34 PM   #1
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Question about KC lights

I recently installed KC Apollo long range 55w lights on my windshield, they aren't what I was hoping for. My question is can I swap out the H3 55w bulbs for 100w bulbs, or will I burn out the lights? The light housing is a composite material not metal and the wiring is the KC stock wiring harness to my SPOD.

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Old 09-27-2013, 07:25 PM   #2
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I haven't done it, but from KC's web site, the housings on the 55W and the 100W look to be of the same material. I'm guessing, but not sure, that the lenses are of the same material as well. It's the lenses that you should be most concerned about.

I'd send KC an inquiry to be sure. KC Hilites CONTACT US

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Old 09-27-2013, 10:29 PM   #3
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I noticed that also about the two lights on their website. The lens housing is glass so I don't think that that will be a problem, the plastic stone guards might be. The line is fused, at the SPOD, so I hope that it would trip if the wires got too hot. I'm also not sure if the KC stock wiring harness can handle the load of 100w lights. I just want to avoid melting the composite housing or causing any damage. I guess I'll have to try and contact KC. Thanks.
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Old 09-28-2013, 09:59 AM   #4
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I wouldn't think you'd have a problem with the wiring. The approximate 50W difference between the two bulbs will result in a difference of 4 amps.

I agree you're fine with the lens if it's glass. I can't believe that they make two different sets of stone guards, so you're probably ok there too.

It's real easy to contact them so they can confirm.
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Old 09-28-2013, 02:16 PM   #5
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the lamp parts are the same. the difference would be the harness, i don't think the 55w sets come with a relay, so unless you added one yourself, you're going to be running full amps through the firewall and your switch. I think the wiring is thinner on the 55w kits. the higher wattage harness has what looks like 10 or 12 awg primary power. Your fuse at the switch won't protect the wiring at all. For example, if i'm running a 2x100w setup, i would need at 20 amp fuse at least, so if i connected it all with thin 24 awg wiring, the wire would burn up long before the fuse blows. Check your wiring for AWG and look at your switch for 12v amp rating if there's no relay. Anyways, those are things to think about.
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Old 09-28-2013, 04:42 PM   #6
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I've got an SPOD so the lights are connected to a relay and have a 15amp fuse. I bought PIAA H3 100w bulbs that claim to have a draw that is the same as a 55w bulb. The wiring harness appears to be 14 gauge. So far all is good, only time will tell now.
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Old 09-28-2013, 06:02 PM   #7
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with 14 awg and relays, you'll be fine with any 100+w bulb for 2 or 3 lights unless you're running long lengths of wire which i doubt. I seem to remember the apollo lights being available in either a 130w or 150w too, but i'm not 100% sure. It could have been one of those situations where you better be moving to keep the lights cool, so the highest wattages were discontinued. I don't know. Anyways, if you're still unhappy afterwards it would be safe to stick in a pair of real 100w bulbs. You'll also need to change the fuse to a 20A with the 100w.

One of these days i will try putting in the short H3C mini HID low color temp bulb in an offroad light just to see how they go. The beam pattern should be good with the bulb in the right spot like that (as opposed to having the focal point all wonky with the usual super long "H3" HID bulbs.)

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