I'm building a led fixture for a 20g long I'll be setting up soon. I've purchased a cree 24 led kit with 16 royal blues and 8 neutral whites. I'll be using a 20" x 6" heatsink.
Should I go with clusters of LEDs or an even layout? Spacing between LEDs would be about 2.5" for the even layout. If I went with cluster layout, spacing would be roughly 4" between clusters.
