They’re similar to the HLG Quantum boards, but mine are from budget grow lights and are Series 2+ 250W XL.
I’m currently using one 250W lamp which has the 2 led panels on it like so:
Definitely going to add another 250W XL to flower these 5 plants out, but should I still use both 250W lamps when flowering 2 plants?
I would use them both, that would provide adequate flowering coverage which would be recommended for that sized space. @OG_Kenobi
Harvest Still hanging. Hoping for elbow or 2. Best bud I’ve grown so far.
Here’s the reply email I got from the Chinese lift people.
Is parallel a more “dangerous” way to wire?
If so is there a series driver?
IMHO and uneducated opinion (having never tested a foxtail as compared to the rest of the bud in a lab or anything) is that a foxtailed flower smokes, tastes, and gets you high just as well as a dense nug with no foxtails. It might take an extra toke. 
I think it’s really just a bag appeal question.
They use constant voltage driver that takes full driver current and divides between all the boards. So instead of running at roughly 2.1 amps per board on constant current driver, they run roughly 2.5 amps per board.
Parallel module wiring is considered less safe due to greater risk of thermal runaway situation. If you have a module fail or wiring issue that causes a module to go out, the whole driver current would be available to remaining modules. In this case, board current could go from 2.5 amps to roughly 3.3 amps. Which is roughly 20% more current than the boards are rated for.
A friend in Colorado went hps in early 2018. I pleaded him not to. I explained spectrum and ppfd. Absorb less light matters nothing else. Upfront cost was all he saw. Now he’s going qb. Stating he didn’t believe or realize ballast, bulb replacement costs are part of running a room. Lol. He’s at 4K watts(4 1k watt bulbs) . He said switching to 16 of the 288s in a 8x8… at full blast he will be at half electric costs. And won’t need to buy new bulbs and ballasts bulbs every other grow
I’ve been working on someone with the same mentality. All the see is the upfront cost and the have only ever used HPS. He wants to take his grow to the next level and asked me to invest. I told him if he were to rethink his position on Led’s and he would not budge, so I left my $ in my account. Plus the power company will not bring in anymore power for him so he is tapped out with the HPS.
@dbrn32 got a question I’m waiting on all my stuff to finish coming in the mail to finish my plc light but am getting a little behind on my time schedule. Is the red in the r specs used beggining, end or whole flowering cycle? Was gonna start flowering my plants im vegging now under my 8 132 boards (4000k) then switch over to rspec and plc in 2 weeks after finishing harvest but i need this run to count and carry me through summer. Another thought is i put my 2 1/2 plants finishing up flowering under my 132s for last week or 2 and put new ones in flowering tent under r specs.
The r-spec boards can be run start to finish, or switch to them later.
So I gotta give it up for pacific lighting concepts wasnt sure if their heatsinks would be any better then ordering from heatsink usa but will say they’ve exceeded my expectations. Much thicker to retain heat better, pre drilled for the plc strips,and also slotted so the strips slide in instead of having to use tape to secure.
Very nice may be switching where I get my heat sinks now. Thanks!
Im not sure that they fit any other strips other then the PLC strips but I’m sure dbrn or even PLC would be able to tell you(would think all 1inch strips would be the same). Or if under 1400ma is probably overkill as they are about double the cost of heatsink usa 1inch profile at 46 inches.
@dbrn32
2pounds top shelf. 24-26” 1000watts.
Three 288s v2
Eight 132v1 6x4 sealed room
Not bad. Learned several very important lessons on the lights on waiting to harvest etc.
This grow has made me question the need of the plants ppfd. mean. Closet lower next time? Idk. I have hard nugs to the very end of branches. Ppfd at
That distance was 2-300. 800ppfd is max possible. But the plant may not take it in.
Had I weighed sooner I would be more lol. I don’t like it spongey. Ed rosenthal says you sell it with 15% moisture but smoke it at 8%
I hear ya, I saw those on build video. They weren’t available when I did my build. 
Sounds like it was worth the wait and added cost.
Not bad at all! I feel like you could probably get a little more with the right plants. Keep working with it.
Yea looked that up earlier, going to go with heatsink usa, I’m using the photo boost light strips so they would have worked but for double the price I will just use thermal tape
