The Chinese Quantum Board Knock Off Builds
- Thread starter zypheruk
- Start date
bk78
Well-Known Member
Oh I’m talking fully charred boards. Not diodes
DrKiz
Well-Known Member
Krypto Kid
Member
I have 1-320w Meijiu. Yes I like it. And it hasn't burned my house down yet.
Rocket Soul
Well-Known Member
Both kingbrite and meijiu (qnd hlg for that matter) has had some burnt oout diodes but ive never heard of any fires. My suggestion is to run china boards @ around .3w per diode/around 80w per board, both for safety and efficiency and matching watts to spread of fixture.
DrKiz
Well-Known Member
clement.beand
Member
Meijiu or Bava, which is better to buy?
christopher jordan
Well-Known Member
Meijiu has the better heat sink by 50%.
DrKiz
Well-Known Member
Hate to be a fanboy, as I like the Bava boards, but the Meijiu bar lights are a better buy.
How much can you dim 120W QB Boards with Meanwell Drivers?
I'm looking into buying some lights from Kingbrite on Alibaba. QBs are new to me. My current configuration is a 2x4x5 tall on top of 2x4x3 tall. I wanted to veg in the lower area and flower in the higher area. It seems like a 240W light would be ideal for the higher area, but I think I'd prefer two 120W lights incase I was to move things around and also if one light fails I still have something there until it's fixed.
I believe 2 120W or 1 240W for the veg section would be overkill unless dimmed. I see there also have 65W lights which would probably be a better fit. I was wondering if I should get 4x 120W lights and substantially dim the ones in the veg section for less intensity, heat, energy cost and increased efficiency and maybe longevity. Then if something happens to one of the flowering ones I can just move it up without skipping a beat.
Does this sound like a decent idea? If I go this route, should I get particular colors or just do everything 3500K maybe with switchable uv&ir.
Thanks for any insight you can provide
I'm looking into buying some lights from Kingbrite on Alibaba. QBs are new to me. My current configuration is a 2x4x5 tall on top of 2x4x3 tall. I wanted to veg in the lower area and flower in the higher area. It seems like a 240W light would be ideal for the higher area, but I think I'd prefer two 120W lights incase I was to move things around and also if one light fails I still have something there until it's fixed.
I believe 2 120W or 1 240W for the veg section would be overkill unless dimmed. I see there also have 65W lights which would probably be a better fit. I was wondering if I should get 4x 120W lights and substantially dim the ones in the veg section for less intensity, heat, energy cost and increased efficiency and maybe longevity. Then if something happens to one of the flowering ones I can just move it up without skipping a beat.
Does this sound like a decent idea? If I go this route, should I get particular colors or just do everything 3500K maybe with switchable uv&ir.
Thanks for any insight you can provide
Rocket Soul
Well-Known Member
For the vegg section you will be better off with qb132 or some strips. Use 4000k sepcctrum.
Thanks! So the qb132 is a 4 pack of bare boards from HLG, but they don't need a heatsink supposedly. So there's some minimal assembly work, but it sounds like that and a driver and some little things and I'd have a nice dimmable veg array at 4000k
Thanks! I haven't begun to even look into strips. So what, those are a bunch of leds powered by a driver like the qbs, but setup on a strip instead of a board? I'm guessing they're better at staying cool due to the form factor and they'd cover better. How do they compare price-wise. Similar?
When you guys say strips, are you talking about something like these?
friendlygrower
Member
Could I run 4x 600w meanwell drivers on a 240v 30amp breaker?? I know there is a big start up rush on each driver
240v x 30a = 7200W
4 x 600w = 2400W
You should be fine.
Edit: I'm actually not sure if you'll be fine. Looks like there's an "inrush current" of up to 70A for a couple of milliseconds. Not enough to burn your house down, but you breaker may or may not trip. If you turn them on one at a time that would mitigate a lot of that. There are also inrush current limiters that work to alleviate that. No experience with them, just letting you know they're out there.
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Moflow
Well-Known Member
Yup or even these
R2T Minimal Sunlike Rock Board 240+X LEDs 301B 351H LED Bar LED Grow Strip for Horticulture Planting - Buy rock board, 310b, 351h led bar Product on R2T Industry (HK) LTD.
R2T Minimal Sunlike Rock Board 240+X LEDs 301B 351H LED Bar LED Grow Strip for Horticulture Planting, find complete details about R2T Minimal Sunlike Rock Board 240+X LEDs 301B 351H LED Bar LED Grow Strip for Horticulture Planting, rock board, 310b, 351h led bar - R2T Industry (HK) LTD.
Rocket Soul
Well-Known Member
They do look nice but seem.geared towards flowering.
Other options are samsung F-series strips or H_influx or even bridgelux eb strips.
I appreciate the comment. I agree, those are definitely oriented towards flowering. I was more just curious if that was the kind of setup discussed. Like a long quantum board instead of a square one.
So what's the benefit? Heat dissapation and getting into the edges of the area better? To me it just seems like it'd be more costly to ship and you couldnt use it efficiency if you ever wanted to do one small area or plant for whatever reason.
Rocket Soul
Well-Known Member
If your veg space is 4x2x only 3 feet tall your going to need all the spread you can get, your plants are going to be close to the ceiling/lighting which means youd have to put in a lot of boards on soft in order to get the right intensity and spread. Id go for 2-3 4 foot strips or up to 6 2 footers across the other way. If you do boards you will have to keep them on very soft but i can of course be done aswell. But a linear build would be better for intensity and spread