Quote Originally Posted by TerraPharma
I'm surprised there isn't any snap together stuff.

If there were...

Would you rather individual LEDs? Or clusters, say nine blue, or nine red?
Individual clusters would be my preferred method. Some panel makers have already hit upon that idea but they're also not doing it how I would do it, so I've got some room to play around and super-improve design.

Although, in very small areas, individual diodes might offer the better choice.