Have not seen this one so I thought I would share. I made a PC case but not much room. This was also much eaiser.
For the fans I use a 12 volt tranformer from a old train set.
The light meter shows grew light refelection with the steel, no marlar yea.
When I need oder control I add a carbon filter over the fans ( blowing out ) with rubber bans. I use an air duck filter from home depo and cut it up, $5 for a 3 X 3 foot piece of carbon filter.
The CPF are a mix of 65K and 25K . From 23 watt to 38 watt.
Just started 12 X 12 lighting, the plants are 2 1/2 weeks old now. A couple of weeks will go all 25K lights. Even though they look happy
The temp stays at 75 with lights on, 62 with lights off.
Hope you enjoy.
People have been right next to with no one noticing anything.
The fans in the back have a peice on black carbon filter to block the light leak, connected with magnets.