
Lighting.one subject that everyone has different opinions on...LOL.
I would just like to point one thing out I've found over the years of using MH and shut up...LOL.
over the years of building my own canopies I have found you need to run top ventilation using MH for one your reflector consumes lots of heat from a MH that's why there thin.so top ventilation should be used because heat rises, the problem I've come accross with out using top ventilation is to get most of your heat out of your canopy there needs to be a lot of air flow which one contributes to more water evaporation and 2 if your lamp is under lots of air flow your lamp my not burn at the proper temp and you won't get the full spectium out of you MH lamp.
