DIY led layout

[Exotic Reef.]

I'm about to build my led fixure and was wandering how my layout looked as far as the whites go

The heatsink has 4 row(top to bottom) and 9 from (left to right ) I'm planing to have 4 neutral white and 3 warm white here the lay out for my whites and suggestions please let me know

X X X X X X X X X
X X nw X X X nw X X
ww X X X wwX X X ww
X X nw X X X nw X X

This was the best lay out I could think out as far as spreading them out

 

[perkint]

What are all the others? And what LEDs are you using?

Tim

 

[Exotic Reef.]

Cree from rapid led .. I'm not really concerned about the others mainly the whites

 

[pwreef]

It will make no difference if you put them in rows like that. Just space them evenly. Proper color mixing is not possible with 20mm stars. You will have disco.