DIY PC lighting steps?

[TheReefGeek]

But with PCs, the tubes are not perfectly round, so you cannot build as good of a reflector to uniformly bounce light back with precision.

With VHOs, I think they all have internal reflectors along the top, so that stops you from bouncing the light back really well with a reflector

With T5s, they are round and no internal reflector (I believe) so you can build a reflector that is matched perfectly to them.