Noob here with QB288 build questions
Posted: Tue Sep 11, 2018 10:53 pm
Hey everbody, Hoagie here looking for some advice. Ive been driving myself crazy the last few weeks thinking about building a light fixture for my future grow.
A bit about the setup: Will be growing 2 plants in a 2'x4'x7' GGT (8sqft). Im hoping to train each plant to fill 4sqft probably by scrogging or maybe mainlining with some fimming and LST. Anyway, the point is im shooting for a nice even canopy and want to hit my ladies with a nice even flow of light.
So my plan is to build a rig with 4 QB288 V2s on Slate 2s with two hlg-240h-2100b drivers. Was planning on wiring two sets of 2 boards in series attached to each driver. Each driver with its own pot, wired into a box with switchs. (the idea being if i ever do seperate strains i could dim or increase light to either side of room depending on plants needs).
Question #1 If i figured this right, i should be running at around 400W, 4A at the wall? Ive heard people say that qbs only need about 30 - 35 watts/sqft to flower instead of the normal 50W/sqft. So would a 400W setup be insanely overkill for a 2x4 space? I know im planning on dimming, but if im way overpowered then i may be able to tone it down a hair.
Question #2 After watching the review vid for the hlg slate three triple and the ppfd comparisons between the slate 3 triple with two boards and the slate 2 with two boards, i noticed that the slate 2 was really hot in the center 1x1 while the slate 3 was a bit more spread out. Im thinking of doing a bit of both by spreading the boards out but evenly across the room so that they are evenly spaced from eachother and the reflective walls to get the perfect spread of ppfd across the entire space. Again, am i crazy? It would be so much cheaper to just do 2 qb288 v2 singles for the space which is what the are specd at for flower. I just dont like how the ppfd chart shows the light dropping considerably around the edges of the light. Im hoping to achieve 700 to 900 ppfd across the entire tent at 18 inchs.
Hoping that someone who knows better will either agree with me or tell me im being totally rediculous so that i can move on and get this build under way!
Thanks in advance
A bit about the setup: Will be growing 2 plants in a 2'x4'x7' GGT (8sqft). Im hoping to train each plant to fill 4sqft probably by scrogging or maybe mainlining with some fimming and LST. Anyway, the point is im shooting for a nice even canopy and want to hit my ladies with a nice even flow of light.
So my plan is to build a rig with 4 QB288 V2s on Slate 2s with two hlg-240h-2100b drivers. Was planning on wiring two sets of 2 boards in series attached to each driver. Each driver with its own pot, wired into a box with switchs. (the idea being if i ever do seperate strains i could dim or increase light to either side of room depending on plants needs).
Question #1 If i figured this right, i should be running at around 400W, 4A at the wall? Ive heard people say that qbs only need about 30 - 35 watts/sqft to flower instead of the normal 50W/sqft. So would a 400W setup be insanely overkill for a 2x4 space? I know im planning on dimming, but if im way overpowered then i may be able to tone it down a hair.
Question #2 After watching the review vid for the hlg slate three triple and the ppfd comparisons between the slate 3 triple with two boards and the slate 2 with two boards, i noticed that the slate 2 was really hot in the center 1x1 while the slate 3 was a bit more spread out. Im thinking of doing a bit of both by spreading the boards out but evenly across the room so that they are evenly spaced from eachother and the reflective walls to get the perfect spread of ppfd across the entire space. Again, am i crazy? It would be so much cheaper to just do 2 qb288 v2 singles for the space which is what the are specd at for flower. I just dont like how the ppfd chart shows the light dropping considerably around the edges of the light. Im hoping to achieve 700 to 900 ppfd across the entire tent at 18 inchs.
Hoping that someone who knows better will either agree with me or tell me im being totally rediculous so that i can move on and get this build under way!
Thanks in advance