Ok, so with high power 520nm diodes on the horizo, and therefore the idea of a compact high power pure diode RGB 'brick' powered by a single supply becomes a reality, do we have a suitable driver available for all of this?
E.g. a single driver board capable of driving 3 diodes/groups individually, plus TEC, running from a common 6-24V supply
Aside from the optics, this is the missing link, but i suspect once the 1W green diodes start to proliferate, nobody is going to be interested in single and dual channel drivers too much, I don't think.