PCB - Solid aluminium core PCB for maximum thermal transferring capabilities

It is required that this is mounted to a heatsink.

To choose your color pattern, either select a proven LED color combination, or, design your own by selecting the color of each individual LED.  Just reference the second product photo for the layout of each LED.

The mounting holes are spaced as follows:

#1 - 1.75"

#2 - 4.25"

We highly recommend using the proven color combinations, as you are pretty much guaranteed success.  We have had many customers make their own combinations, only to return them and ask us to change them to one of our proven combinations because theirs did not perform well, or they had excess nuisance algae growth (like when reds are used in a reef setting).