I understand that during flowering the optimal lux should be between 45k and 70k. I’m using a 400w HPS in a 2x4 tent. At 12 inches from the lamp I’m only reading 27,500 lux with a brand new lamp. This would seem to indicate that to reach 45k I would need 2 400w fixtures.
2 fixtures in this tent is going to produce a ton of heat. Am I missing something? Thanks for your help!
I don’t have a lux meter. Never really sience’d it that far to be honest.
I’ve just based it on 50 w / sq ft and covered my space accordingly.
Currently got 2200 w covering 50 sq ft and I should have another 300 w to bring me up to where I should be for proper coverage.
I’ll find out after this grow if I’m gonna add more light or cut back on plant count.
I don’t do lux but grew under HPS for 20+ years. I used a 600 watt HPS in 3x3 tents the last 7 years and that was more than enough light to grow great dense buds in that space, a 1000 watt HPS in a 2x4 is a bit much and I’d be surprised if you can keep the temps in check with that.