DIY with Quantum Boards

pop22

Well-Known Member
Its a good thing they are cheap, I replace mine every two years after dropping a 32 pound light in my 2 weeks into flower plants and crushing them! That also who I added a safety chain!

I replaced the rope in my T5 with parachute cord. 10 times stronger than the original rope AND UV protection coating. Hmm wonder in I can change the rope on a ratchet pulley. Shouldn't be hard and 100ft. cost me $10.00, cheaper than buying new pulleys!
 

pop22

Well-Known Member
there are also different compounds for different color temps. I've read there is also a way the now coat a lens with the coating to keep it off the LED and has improved efficiency. A lot of the improvements we've seen in the last few years has been due to improved coatings.

My "hypothesis" is that if the phosphorous mix has slightly different thickness/densities, the thicker/more dense one would probably run slightly hotter. There's only one way to find out!
 

pop22

Well-Known Member
maybe I'm figuring this wrong. and I'd like a link to that info, seems mighty high for a single board

HLG's tests show a 288 V2 rspec board has a PPF of 1256. Using the HLG conversions for the V2 board a 1250 PPFD is 80,000 lux. I climbed into the bilge and did a few measurements to compared to the HLG site. Cranking the driver to 135w, using a Kill-A-Watt, at 12" from QB the app said 85K lux, not so far from the 80K Going to the max of 161w the lux climbed to 99K lux or 15000 ppdf. It appears that the phone app may not be that far off. 5-6% At 55W and a 52K lux reading at 10" would have a PPFD in the 850 range. Does any of this sound close ?
 

Snafu34

Well-Known Member
Barristan and pop22 - I could very well be terribly confused - If you would please look at this page - It lists the specs for the 288 rspec and has a lux to ppfd calculator for the 288 rspec.

https://horticulturelightinggroup.com/blogs/calculators/converting-lux-to-ppfd

VersionLumens*PPF*Lumens/PPF
QB 288 V2 Rspec81138.43*1256.92*64.55337
QB 288 V2 3000K80833.17*1178.05*68.61607
QB 288 V2 4000K13421*193*69.5388
QB 96 Elite V253840.87*810.44*66.434
Then if you would take a peek at the test results done on the QB 288's with ppfd measurements taken at 12" & 18" here. Note: these are for version 1 board. Version 2 is reported to have a gain of 5%. I have not seen number for the 288 rspec.



They got a ppfd at center of 1140 at 12" - I'm measuring even closer at 10"

Thanks a bunch

spelling edits only
 
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Snafu34

Well-Known Member
I started to push the wattage and will keep a good eye on them - What is typically the first signs of too much light ? My temps are great - cab 77.5
tops 80 at 57% humidity. They are looking pretty good but the bub size is lacking this time around. 45-50 day stain with 14-16 days remaining

 

pop22

Well-Known Member
Interesting! I see that I was wrong. That expains why my QB 324 in a 32"x32"x60" tent is great for veg! Here's that tent with the one QB 324 in it


Small tent pic1 -5-16-2020.jpg

I didn't stop to think that my light is 2 boards sharing that 130 watts. Also, I put my light in a frame that rests on 1x2 screwed to the side of my cab. I have two positions, the highest brings the light to 1.5 " from the top the other about 6" from the top. its at the 6" position, I didn't bother to raise it. Also, though it ;looks darker close to the front, its not, its just the picture. If I could get a pic from the top down you'd see. When this grow is done, i'll put my lux meter in there and see what I get for readings.


Barristan and pop22 - I could very well be terribly confused - If you would please look at this page - It lists the specs for the 288 rspec and has a lux to ppfd calculator for the 288 rspec.

https://horticulturelightinggroup.com/blogs/calculators/converting-lux-to-ppfd

VersionLumens*PPF*Lumens/PPF
QB 288 V2 Rspec81138.43*1256.92*64.55337
QB 288 V2 3000K80833.17*1178.05*68.61607
QB 288 V2 4000K13421*193*69.5388
QB 96 Elite V253840.87*810.44*66.434
Then if you would take a peek at the test results done on the QB 288's with ppfd measurements taken at 12" & 18" here. Note: these are for version 1 board. Version 2 is reported to have a gain of 5%. I have not seen number for the 288 rspec.




They got a ppfd at center of 1140 at 12" - I'm measuring even closer at 10"

Thanks a bunch

spelling edits only
 

Stephenj37826

Well-Known Member
My "hypothesis" is that if the phosphorous mix has slightly different thickness/densities, the thicker/more dense one would probably run slightly hotter. There's only one way to find out!
It has more to do with how many photons remain blue vs shorter wavelengths. Think energy lost in conversion is now heat. So even if the identical amount of photons are emitted the cooler cct will run cooler as it has had less of the blue photons "stripped " of energy.
 

TWest65

Well-Known Member
It has more to do with how many photons remain blue vs shorter wavelengths. Think energy lost in conversion is now heat. So even if the identical amount of photons are emitted the cooler cct will run cooler as it has had less of the blue photons "stripped " of energy.
I'm a little confused by "remain blue vs shorter wavelengths". A shorter wavelength is a higher frequency.
 

Stephenj37826

Well-Known Member
I'm a little confused by "remain blue vs shorter wavelengths". A shorter wavelength is a higher frequency.
So the blue spike is unconverted. The more conversion you have the more electrons turn into heat. The photon turns into electrons through phosphorescent. Some of those photons recombine to make a photon that has less energy(shorter wavelength). Each photon is it's own subsystem so any electrons that are "lost" turn into heat. Photon A and photon Bs electrons do not interact. So if a blue 450 nm photon ends up being a 660nm deep red photon (shorter wavelength than 450nm blue) all the energy(electrons) left over are now heat.
 

downhill21

Well-Known Member
They're usually $168. Arrow ships free. You got skunked a bit. they're out of stock though so your options are limited. I bet you could saved 40-50 had you searched a bit. But not a huge deal.
Who else is trustworthy for Meanwell drivers? Looks like there may be an inventory shortage & delays, & I don’t know any of these vendors. Glommed onto your Arrow reference, but 11 week lag on driver I’m after.
 

Federucci

Well-Known Member
K. I’ve seen all of those out there, but didn’t know if they were legit. That’s exactly what I needed. Merci boucoup.
Be advised that if you order drivers from TRC, you will have to wait a few weeks, but their service is top notch. They claim five weeks for delivery.

What kind of driver are you looking to get?
 

pop22

Well-Known Member
Arrow, Sager, and Online Components ALL screwed up orders With Sager being the worst: emailed me an OOPS! we're out of stock, when I ordered online they had 100.. Ordered a different driver, the sent me the wrong one! Arrow, sent me the wrong driver and jerked me around for 6 WEEKS getting a refund. I've ordered from Moser several times with no issues at all and excellent customer service for a return of a failed driver. tHey cost maybe a couple bucks more, but I won't order from anyone else!


Who else is trustworthy for Meanwell drivers? Looks like there may be an inventory shortage & delays, & I don’t know any of these vendors. Glommed onto your Arrow reference, but 11 week lag on driver I’m after.
 

Humple

Well-Known Member
Arrow, Sager, and Online Components ALL screwed up orders With Sager being the worst: emailed me an OOPS! we're out of stock, when I ordered online they had 100.. Ordered a different driver, the sent me the wrong one! Arrow, sent me the wrong driver and jerked me around for 6 WEEKS getting a refund. I've ordered from Moser several times with no issues at all and excellent customer service for a return of a failed driver. tHey cost maybe a couple bucks more, but I won't order from anyone else!
I've had nothing but positive experiences with TRC, Arrow, and Sager, but I appreciate that you're sharing your own experience. I have yet to order from Mouser, precisely because of their consistently higher prices, but it sounds like their customer service was worth it for you, so that's cool.
 
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