Hi SD, what about heat, I'm wandering if your lights is air vented, all ducting going to manifold right? and all this heat from all 5 lamps just going outside? 18h - is veg.perd, and 12h - is flower.perd. OK , but now is summer. what about in winter time ( veg.perd is 18H) so day is shorter, but you need to reed of hot air for 18h which is going out side? The point why I'm asking is helicopters start patrol when it gets dark and temperature gets lower so they able to see heat lose from houses, I mean the heat from air vented lamps . So, how do you read of this problem?
Regards