Serva
Well-Known Member
Just look the post I linked, it is definitly changing the results!
Bridgelux EB Series Build
- Thread starter brahbbyB
- Start date
Danielson999
Well-Known Member
Maybe you're better off leaving a bit of voltage on the driver instead of trying to push it to the max.Well it looks like my calculations were correct.
I tested the output of my driver, and it read 84 volts, which seemed to indicate that I could run 3.5 x 2' strips @ 24volts each. Well 3 worked fine, and when I tried adding a 4th they started blinking.
So maybe I should have waited for the Gen2, which run at 20v? And then I could have easily ran 4x2'@20v using my 84v LED Drivers?
Instead of running 3 Gen1 strips at 24v = 72v, meaning I'm leaving 12 volts on the table
I was actually thinking I might be able to just add a 1' strip to each series circuit, assuming that the 1' would run at 12v instead of 24v, but it doesn't look like the 1' strips actually use less voltage...
I guess I should have studied engineering instead of english lol
Danielson999
Well-Known Member
If you're referring to Graying Geeks first and second run with EB strips then I would suggest understanding that his first run, he put plants that weren't used to LED light under EB's that were way to close and he shocked the shit out of them. The spacing did absolutely nothing to prevent bleaching or burning, starting the plants under LED's and keeping the lights spaced from the canopy properly is what stopped the bleaching.
Spacing the lights in the center of your tent will do next to nothing for your results. You're talking about adjusting the density of photons by extremely marginal amounts.
Serva
Well-Known Member
Wtf? He used a lux meter to measure before and after spacing, go back to his thread, and read his post, if you skipped it!
Why do you referr to light bleaching? I don‘t know... but you referr to the bleaching he got in the middle, not at the sides! So one more point for me!
Sorry, but this is absolutly stupid, to say spacing won‘t change any.... than a HPS bulb has the same ppfd across the whole canopy? And we don‘t need several lightsources like strips, to spread these photons out evenly? You are missing basic physical knowledge, and spreading missinformations!
Why do you referr to light bleaching? I don‘t know... but you referr to the bleaching he got in the middle, not at the sides! So one more point for me!
Sorry, but this is absolutly stupid, to say spacing won‘t change any.... than a HPS bulb has the same ppfd across the whole canopy? And we don‘t need several lightsources like strips, to spread these photons out evenly? You are missing basic physical knowledge, and spreading missinformations!
Danielson999
Well-Known Member
You're right this is stupid. I've done the math and even better, I've grown with the EB's at different spacing and there was ZERO difference. My photons, just like everyone else who runs EB's are spread out over my entire canopy...and spread even distances apart. If you want to add a 1/4" or 1/2" difference in spacing near the center of your tent go ahead but it's not going to change your results.
If you're growing with 200w (for example) in a 2'x4' tent, your results (final weight) are going to be identical whether you space your damn strips an inch further apart in the center or not. That's just common sense, not missinformation. If you'd like to prove me wrong why don't you actually post a grow using both examples and we will see how your results differ.
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projectinfo
Well-Known Member
Right on.
So I've got 14 two ft strips
A series hlg 240h 24a
I can run 14 strips at 50 % for efficiency
Or use my second identical driver and run two sets of 7 at 75-80%
http://ledgardener.com/parallel-strip-build-tool/
What do you guys think to keep the heat down. I just used RTV high temp silicone like nfhiggs said.
This is for a 2x4 scrog flower table so I'm looking for intense but not over heat the strips or burn my house down haha
So close.. I mounted the strips on aluminum strips and put them on a wood frame I painted with mold n mildew paint.
So I've got 14 two ft strips
A series hlg 240h 24a
I can run 14 strips at 50 % for efficiency
Or use my second identical driver and run two sets of 7 at 75-80%
http://ledgardener.com/parallel-strip-build-tool/
What do you guys think to keep the heat down. I just used RTV high temp silicone like nfhiggs said.
This is for a 2x4 scrog flower table so I'm looking for intense but not over heat the strips or burn my house down haha
So close.. I mounted the strips on aluminum strips and put them on a wood frame I painted with mold n mildew paint.
Danielson999
Well-Known Member
It looks great. By the way, if you have even a slight breeze hitting your strips they will never get hotter than warm to the touch. It's only when there's a lack of airflow that things heat up. So just keep airflow on them and it's all good.
projectinfo
Well-Known Member
OK so just one driver is good?
And thanks bud, 18inch wall mount oscillator fan blows over my lights and canopy . Should be more than enough air flow.
And another 24inch box fan in the room
Serva
Well-Known Member
I clearly see you never did the math, or suck at it. Please show your calculations to us, so I can tell you, were you are wrong!
Common sense... so please tell me, why HLG went away from theire old heatsink design, to the new one, which spreads out the QB‘s? Right! To achieve a better ppfd, so better final results!
You just ignore everyone, showing you, that a proper spreading will increase results! What about he measurements @graying.geek provided? Before he spread out logarthmically he had a factor of 4 in the middle and 1,5 at the sides. After proper spacing, he had nice uniform numbers. Please show us your results, providing the opposite results you are claiming to be truth!?
BuddyColas
Well-Known Member
What strip spacing and height above canopy do you use?
Danielson999
Well-Known Member
Dude, this is the EB thread. All of us have our strips spread out across our canopy, get over it. We are talking about a guy who asked about spacing in a 2'x4' space. I'm telling you, his results will be no different whether he changes the spacing an inch or two one way or the other. If you think his final weight will be different feel free to show me results that prove this. I don't need to prove anything, you do. You're the one misleading people in here to think that if they "logarithmically" adjust the spacing of their strips it will somehow lead to a better yield.
Here's a news flash for you. We are using EB strips because we love to have our photons spread across the entire canopy. If you want to argue about moving certain strips an inch or two to one side go ahead...but you're wasting everyone's time.
Danielson999
Well-Known Member
I have fixtures with both equal spacing and with spacing spread out towards the center. I adjust the height above the canopy depending on what the age and condition of my plants are, just like everyone else should be.
Danielson999
Well-Known Member
Sorry I never did catch what driver you're actually using. I did see 14 560mm strips. If you're wiring in parallel, I'd use a 320w driver in that space.
projectinfo
Well-Known Member
Thanks, IL turn it up full blast. Both knobs.
So I have a second driver. Could I wire this into the mix , two pairs of 7 and get more light out of the strips? Or do I need to buy more strips? And make this twice the light?
projectinfo
Well-Known Member
Hlg240w 24a
But I have two of these drivers. And I can buy more strips and double this light if need be
PS I left the light on lowest dims. And left it high because it's all new. and I'm being safe...
Lights on the table behind are two mars pro series 2 epistar 160s
PS the strips are mix of 3000k and 5000k
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BuddyColas
Well-Known Member
Not to piss in your Cheerios mate, but some of us have the "B" driver and just dim the lamps down rather than raise them up. Just saying...more than one way to do it.
Serva
Well-Known Member
10a / 7 strips = 1430ma (and the A version may have even more than 10a!)
maximum drive current of the strips= 1400ma
So you need to dim the current output of the driver! This way maximum output would be around 460w (2x 7x 1400ma*33v). Driver current limit needs to be 7x1400=9800ma to be safe.
maximum drive current of the strips= 1400ma
So you need to dim the current output of the driver! This way maximum output would be around 460w (2x 7x 1400ma*33v). Driver current limit needs to be 7x1400=9800ma to be safe.
HiloReign
Well-Known Member
Saw graying.geeks measurements/thread and it made sense to me. The center of his fixture had too much overlap(for lack of a better word), so he adjusted spacing and achieved better spread. I'd be interested in seeing evidence of Danielsons refute.
StreetPreacher
Member
Does the artwork help increase the yield?!?!
Sort of like classical music or talking to your plants can make them happier?
