I think I want to use Samsungs H-Series SI-B8T11156HUS, which are the ~22" strips in 4000K color temp.
Right now I'm trying to determine which best configuration to build the lights in:
- 6 x 22" strips, side by side down the length of the shelf, 11" apart
- 8 x 22" strips, side by side down the length of the shelf, 8.5" apart
- ...even more strips for tighter spacing?
Decided on using the ladder pattern because I think it will produce more even coverage across the entire shelf. I also found this post here that covers essentially the same thing I'm trying to do but in a less wide space (4").
I'm thinking eight 22" strips per shelf will work, ten strips would likely be overkill for just lettuce and herbs. Now I just need to decide on which 22" strip to use (H562D, F562B, or F564B) and then pick out a power supply.
--- UPDATE 01/15/2018 ---
Decided I'm aiming for driving the strips at 50 - 75%. Definitely going to use the F-series because you pay just ~$1.50 more per strip to get 50% more diodes and as a result 50% more max current.
Thinking that shooting for ~15 watts/sqft @ 12-18" from canopy for veg should be fine, saw another build that was very similar to mine that was growing veggies ok at 7.5W/sqft @ 16". The HGL 65 does 16W/sqft @ 18-24" for veg. This all means I should be ok with just 6 strips @ 190W for a 6x2" area.
For a driver, the HLG-240H-24A seems to fit the bill and even allows for expansion to 8 strips total should I need it. Going to sleep on this for a day or two before pulling the trigger and ordering everything.
--- UPDATE 01/17/2018 ---
Parts ordered, should get everything in a week or so. Also ordering seeds, rockwool and some quality grow trays. Meanwhile I need to think about the light frame, wiring and hanging hardware. Also need to figure out NFT channel plumbing and hardware. Hoping to have this system operational in 2-3 weeks.
--- UPDATE 01/07/2019 ---
Well, its been about a year that I have been running these lights and I have to say that they pretty much exactly did what I wanted them to do. Even strong enough to enable insane amounts of flowering with strawberries. Let it be know that ~15 watts/sqft @ 12" with my setup is plenty to grow strawberries. Future strawberry growing updates will be posted here: https://growingfruit.org/t/growing-stra ... nics/18667