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You talking about Agro max? Their pure veg is a real nice bulb. Hortilux has a nice UV t5 bulb as well.

UV I would just do solistek 10k bulb for now until led gets affordable for UV. 10k bulb has a ton of UV for finishing or cmh.

I don't think the spectrum charts on the homepage are the quantum boards. Looks more like cob, you have to click on the quantum to see spectrum for current model.

Anyone know how to calculate efficiency? Want to know board efficiency at 930-1000 ma. Parallel if that matters. 320h c2800 running 3 boards.

What is the efficiency of the quantum at 1000ma?

What about cutter http://www.cutter.com.au/categories.php?cat=Leds+soldered+on+Printed+Circuit+Boards

It probably wouldn't even be news if it was reversed. It is fucked up though especially if that kid had mental issues.

Just wondering if the 4k will be the exact same size as the existing boards so I can start prebuilding a frame using my boards I have now as a template or if I should wait.

Do you happen to have a link or a pic of the spectrum at 4k for the EB strips?

What size boards are the 4k and 5k going to be avaliable in?

Thanks @vahpor. Yea I think I may go with a HLG 120h c1050 the samsung strips are 22.5 Vf x 6 puts me at 135. Don't need to drive them that hard 1050ma so I will just dim to 70 percent but have the ability to crank a little extra if needed. Converting 2 t5s I will do one with strips and one...

I have watched his video with cobs and stars but just wasn't sure if these strips can be powered directly with a driver or needed some of the pwm gear and buck drivers etc. It looks like they can be powered directly with a meanwell driver. Just when I thought I had it figured out I found that I...

That makes me wonder if the 4k might be better than the 5k. It appears they both have the same amount of blue but the 4k just has a lot more red spectrum than the 5k. I don't want lanky plants but I sure don't want them compressed either. I would rather them stretch and top them if needed...

Yes it does work fine and is a bit stretchy and I wonder if the blue in the 4k would help that or would you need less red and the same blue like the 5k.

I am curious what light is better for veg only, the 4k or 5k or is it still undecided? Also is the 4k and 5k going to be avaliable in both board sizes?

@CB DEE how big was the light measurement testing board ? 2ft x4ft ?

What are the screws or screw covers on the back of the board/heatsink? I see you have the stock screws on the board side but on the heat sink side it looks like a Allen bolt. Also what is that dimmer box that is holding the wire connections?

Very clean work @CB DEE

Can you power these or the Samsung strips with only a meanwell driver or do you need those other parts?

I guess that's my point. RDWC growth is already awesome , i am just itching to see what these lights can do mixed with some buckets and this light spectrum.