70 amp charger cooking 12v LEDs?

DiskDoctr wrote:
These are the bulbs I bought and am waiting to arrive in a few weeks.

ebay link



They are the same ones I have in our hybrid and have been PERFECT.

But now I am looking at the possibility of a HIGHER VOLTAGE charging system (like the PD or other) for two 6v GC2 batteries we haven't yet purchased.

I am likely to be replacing the switches in the lights to allow one or both lights per fixture to light anyways. Maybe I should add a resistor inline?

What size and still have a good "light at low battery" ability?

They don't offer a regulated version of this light. It is the BEST color one I have found (posted this mod up a few years ago when we did it), and have tried others before that with unsatisfactory results.

I am unsure if I have any extra around, it's been a few years. Pretty sure we used them all.

My electronics buddy with a scope is out of town for a while. I will likely be at least 2 weeks before we can get together. Hoping someone here can help?

Thanks.

Don't need a scope, NEED a AMMETER AND VOLT METER.

Ammeter in series with one of the LED modules and a volt meter in parallel with the LED module.

Monitor the current draw at normal battery voltage, that should give you a baseline current and voltage to start with.

Then monitor the voltage and current above normal battery voltage.. If current increases SHARPLY then adding some resistance may be warranted.

I would suspect the resistance needed if any would be very small but if you like, instead of a resistor you can simply add a regular silicon power diode in series. A regular silicon diode will drop about .6V-.7V which would get you back to say 14.2-14.1V respectively.

Ideally a variable voltage source would be helpful (IE variable bench power supply)..