Do they end up looking nice, though? DIY in a hood or canopy is one thing. But over a rimless pico, it has to look good.

As soon as I see diagrams, my eyes glaze over.

I have retrofits on my big tank, and even that was an ordeal. I'm all for the pre-fab light on the pico now.

If you do a DIY, post pics - and dumb it down for folks like me.