I've watched few of youtube videos of similar builds in the past, could be your's I'm not in the know here yet, but a question, is the insane heat-sink absolutely necessary? ofc no harm there, it's just appears like the grey area of people who install the loud open exhaust systems in their cars saying that the stock is choking the engine (engineers facepalm)
1. If I were to build this, would I get away with a passive heat-sink?
2. What is the max operating temperature of that LED?
3. Is the maximum current/voltage determined by the operating temperature the emitter can handle before melting?
3b. If this logic implies, overclock?