MisterBill2
- Joined Jan 23, 2018
- 18,167
That was the point that I was hoping to be making. It seems that I am misunderstood a lot these days. But I don't know what the forward voltage is on those super bright RED LEDs. My point has been that the series string drop should be around ten volts. The idea being to have the resistor dropping less than one LEDs forward drop. And the current set to be just a bit below the max operating current at the absolute top DC system voltage, probably maximum charging.I'm pretty sure that all the automotive red LED tail-lights use red LEDs.
It would be more costly and inefficient to use white LEDs.
Then for normal operation the current should be comfortably below that level. It is not a good idea to run LEDs at the max value, just like it is not wise to run your car's engine at the rated horsepower just short of red-line RPM for extended times.