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7 Posts

Posted - 12/04/2010 :  08:12:23  Show Profile
I bought these LEDs that say they're ready for 10-14v(?). So can I assume each one has a resistor in it?

I plan on connecting 4 for each tail light, and 6 for each headlight, and connecting them up to the main 12v battery. I know the lights will dim as the battery dies, but that will save me having to buy another 12v battery. Since the LEDs draw so little, I would think I wouldn't see any dimming until the battery is practically dead, right?

Advanced Modder


2622 Posts

Posted - 12/04/2010 :  08:22:16  Show Profile
Yes those already have resistors on them.

Yes you can wire directly into the stock battery Just do it in praellel meaning each light goes to + and - off battery don't hook them end to end or it will decrease power to them. All reds go to + and all Blacks to -

You won't notice them dimming before you notice the car dieing more than likely. Leds use a fraction of teh amount of power as an incandescent bulb. I have LEds on my kids gator all running off main battery. You can see here it has headlights, running lights, gauge lights and switches are lit all with leds. We drove it on Halloween all through out neighbor hood with lights on and flashers going for 2 hours on same batt and they never dimmed and it never slowed down. That wasn't all driving but the lights were on the whole time.

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Edited by - blake711 on 12/04/2010 08:23:21
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Senior Modder

(77627) Nederland

2272 Posts

Posted - 12/04/2010 :  14:11:41  Show Profile
LEDs (or fluorescent/halogen/etc.) actually don't dim like incandescent bulbs - they can only operate in a very narrow voltage range. They can dim a very tiny (virtually unnoticeable) amount within that range, but above or below that, they will not emit any light.

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