Overgrowtho
Well-Known Member
I am working to maximize my yield in flower. Today I picked up a 3rd White Light 3000K 240 Watt Quantum Board for my 4x4 ft. chamber. I have been running 1100 PPM Co2, and keep the room around 29.5 C.
My questions (first two are simple, 3rd is more important and difficult):
1. Do I keep this 1,100 PPM - 1,500 PPM level for the rest of flower (of course stop 2 weeks before harvest) and is it worthwhile to bump up to 1,500 PPM?
2. Shall I keep 29.5 C as my temps (which is said to be ideal for Co2-enhanced grows) or slowly decrease (simulating autum season)?
3. The more complex question:
I am running max 750 watts of Quantum Boards (3,000K and 3,500K and 3,500K including one with with UV+IR). Total I have about 3,300 PPFDμmol/(m2·s) if considering the 2x 1000 PPFDμmol/(m2·s) lights and 1x 1300 PPFDμmol/(m2·s) UV+IR light. When not dimmed.
I think this is quite a lot for a 4x4. And likely too much light in the center (which would reduce yield). Does that sound correct? Now like most people, I don't have a PPFD meter but I can measure Lux with my phone easily. I've read that cannabis maxes out at 1500 PPFD or 80,000 LUX even with CO2.
If I have all the lights on full blast, it can get up to 200,000 LUX in the middle of the canopy! I've turned the middle light down 50% and so lux in the center comes to just around 100,000. It is the right move to dim, by half, the middle light or not?
My questions (first two are simple, 3rd is more important and difficult):
1. Do I keep this 1,100 PPM - 1,500 PPM level for the rest of flower (of course stop 2 weeks before harvest) and is it worthwhile to bump up to 1,500 PPM?
2. Shall I keep 29.5 C as my temps (which is said to be ideal for Co2-enhanced grows) or slowly decrease (simulating autum season)?
3. The more complex question:
I am running max 750 watts of Quantum Boards (3,000K and 3,500K and 3,500K including one with with UV+IR). Total I have about 3,300 PPFDμmol/(m2·s) if considering the 2x 1000 PPFDμmol/(m2·s) lights and 1x 1300 PPFDμmol/(m2·s) UV+IR light. When not dimmed.
I think this is quite a lot for a 4x4. And likely too much light in the center (which would reduce yield). Does that sound correct? Now like most people, I don't have a PPFD meter but I can measure Lux with my phone easily. I've read that cannabis maxes out at 1500 PPFD or 80,000 LUX even with CO2.
If I have all the lights on full blast, it can get up to 200,000 LUX in the middle of the canopy! I've turned the middle light down 50% and so lux in the center comes to just around 100,000. It is the right move to dim, by half, the middle light or not?