Ordered the heat sinks for the LEDs, here is a picture of them. Experimented with various currents, at 3 volts the CREE LEDs are not drawing a lot of current, I am only seeing about 120 mA for the GBW, and about 300 for the Red.
Red is currently much brighter. Tomorrow I'll experiment with 5 volts although even at only 150 or so mA they are still quite bright.
They can handle up to 700 mA though, so can probably squeeze some more brightness out of them.
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