onesky:
Chagrin:
Honest question: why does this circuit work? You have four strings of 16 LEDs in parallel, being fed by a constant current driver, but no single LED goes into a runaway that takes down the string?i don't understand much your question can you explain more?
If you set 16 LEDs in parallel you're making an incorrect assumption that they'll share the current equally. Inevitably one of them will consume more than its share of current and it will burn out. Then when any single one burns out you still have the same total current (320ma) but that's now being shared by only 15 LEDs -- the LEDs will start experiencing a cascading failure.