I'm looking to run some COB LEDs (these to be specific) off a battery pack of 4-6 "C" or "D" alkalines. I'm shooting for maximum longevity -- having to change the batteries as little as possible. This is going to be built as an under-cabinet lighting system for a legally blind person, so the less he has to worry about changing batteries the better.
What would be the best way to do this? Should I just go with 4x batteries and run the LEDs directly, or put something like a buck regulator in the middle and use 6x batteries so that, as the batteries drain, the LED remains lit at a consistent brightness?
What would be the best way to do this? Should I just go with 4x batteries and run the LEDs directly, or put something like a buck regulator in the middle and use 6x batteries so that, as the batteries drain, the LED remains lit at a consistent brightness?