0 to 220 wrote: ↑Fri Jul 12, 2019 4:45 am
Prawn Connery wrote: ↑Fri Jul 12, 2019 4:30 am
Lol! You ask "why 3000K?" and then proceeded to tell us you'd be first to buy 3000k CRI90.
Relax chef. I think you misunderstand. I'm asking the same question as you are, and supplementing it by stating that even for home use 3000k is best (in my opinion). So, I too am wondering why they are not available in 3000k.
Anyway, arranging pcbs like QBs in squares creates a situation where the diodes are not distributed evenly. I'm kinda used to squares after vertical CMH
Sorry. I re-read your post again and I interpreted it back-to-front
Apologies - I'm now on the same page.
Ok, I'm going to blow my own trumpet here . . . When we were designing the High Light boards, we also recognised that a square configuration was optimal for most indoor growing spaces - be they tents or room grows. We wanted a direct 600W HPS replacement and came up with the idea of a 16"x16" board. But it was too big - both for readily available heatsinks, and when ordering PCBs. So we cut it in half to produce a 16'x8' board that, when placed side-by-side, would form a modular 16"x16" pattern providing even light coverage and allowing the individual LEDs to be spaced nicely for heat dissipation.
The pattern is perfect for 3'x3' coverage - or for just about anywhere else you would place a 600W HPS.
But in a 4'x4' it was a bit trickier. Of course having 16"x16" over each 24"x24" (2 foot by 2 foot square) provides almost unparalleled coverage - even better than strip lighting. But it means having 8 panels per 4'x4' and driving them at less than half their rated maximum power (225W). Again, great for efficiency, but 8 panels can by expensive for those on a budget.
Still, there's not much else on the market than can cover a 4'x4' quite like 8 High Lights running at 80-90W each.
However, we also noticed some growers wanted to add LED panels to their current CMH grows to supplement red and increase yield efficiencies. For that, we have provided double heatsinks that allow the panels to be arranged end-to-end: you put one panel in each side of the tent, angle it towards the middle slightly, and place a CMH bulb in the middle.
Best of both worlds! You get excellent and efficient light spread with lots of red and a good amount of far red, as well as the UV boost from the CMH.
You can also run the long panels in tandem to cover a 4'x4'.
Here's the light spread from four panels running at 3.5A (168W each = 672W total)
This one is at 15" with 70% reflective walls
Here's the same with 80% reflective walls
Turn the wick up to 4A (196W x 4 = 784W) and hang at 18" and the spread is really nice. All figures are in PPFD
So, rectangles can also work.