Hi Lance,

to reduce the current you can use some LEDs in series, driven with a switching regulator as constant current source. Then you can switch off any LED with a transistor to short circuit it.
E.g. on 24V you put 10 LEDs a 2V in series and the current was 10 times lower.

But on such many LEDs close together, you must also watch the temperature to avoid overheating.


Peter