EB Gen 2

[DaveJonesFan]

I'm looking at building a 4 strip build of 4 foot EB Gen 2 strips.

With the 1 footers at ~19.5v the 20v meanwell constant voltage drivers match up well, but if I want to run these (4) footers in parallel and hopefully adjustable as low as possible and up to about 75% at max. Would one of the 42v constant voltage drivers be a good fit?

HLG 240H-42 says 39-45v

HLG 320H-42 says 38-45v

Bridgelux data sheet says 4 footers:

at 700mA 37.0v / 39.0v / 41.2v
at 1400mA 38.8v / 41.0v / 43.2v



Maybe I need to be looking at something like wire 2 strips in parallel then series so voltage would be 74-87v

HLG 240H-C1750?

Looks in range of driver which is 71-143v.

Current would be 0.875A - 1.750A on driver, so 0.438A - 0.875A to each strip.

HLG 240-C2400?

Looks in range of driver also which is 59-119v.

Current would be 1.050A - 2.100A on driver, so 0.525A - 1.05A to each strip.




IF I went with 3 strips that would be 111-130.5V in series and the HLG 185-C1400 might be a best match with .7 - 1.4A current adjustment spot on with the strips nominal to max current, and output may be as good as the 4 strips.

Maybe that's the ticket. Hope I'm starting to think about this right, but too tired to keep thinking about this. Thanks for any help.

[DaveJonesFan]

Couldn't sleep so then was thinking about doing the thing as 3 groups of 2 strips, so wire each group of two in parallel then series that together to get the 111-130.5V range within the HLG 185-C1400's window, and then I'll be down at .35-.7A adjustmentish window per strip. Will I be getting efficacy and maximizing the driver and balling out of control?

Maybe so.

Would 46" long of the 1" profile heatsinksusa babys be suitable for something like that?

Hope that's it. Jeesh. Looking for something suitable for 1 or 2 racks on a 48" wide by 18" deep metal rack thing and that would probably do 2 racks well.

[LEDG]

Couldn't sleep so then was thinking about doing the thing as 3 groups of 2 strips, so wire each group of two in parallel then series that together to get the 111-130.5V range within the HLG 185-C1400's window, and then I'll be down at .35-.7A adjustmentish window per strip. Will I be getting efficacy and maximizing the driver and balling out of control?

Maybe so.

Would 46" long of the 1" profile heatsinksusa babys be suitable for something like that?

Hope that's it. Jeesh. Looking for something suitable for 1 or 2 racks on a 48" wide by 18" deep metal rack thing and that would probably do 2 racks well.

Hahaha balling out of control - love it.

With only 4 of these 4 footers, running series would make sense. You could run them on an HLG-185H-C1050 which would run them at 75%. I think the 1” heat sink would be perfect for these.

[DaveJonesFan]

Thanks for the help on this one. Quick pic of the final light I put together in the top of a 48" wide wire metal shelving rack for veg space.

Light assembly:
Meanwell HLG-185H-C1050B (~168 watts + max in this serial configuration)
RapidLED cased potentiometer (looking into whether these are ideal? Seem to work with no dead spot.)
2x BXEB-L1120Z-35E4000-C-B3 (3500K 1120mm EB Gen 2)
2x BXEB-L1120Z-50E4000-C-B3 (5000K 1120mm EB Gen 2)
4x 46" long, 1" HeatsinkUSA
2x 15" cuts of 3/4" Aluminum L angle in 1/16" as ends
Aikenuo 20mm x 0.25mm Thermal Adhesive Tape (screwless design, using tape for strips > heatsinks and heatsinks > end angles)


Intake/exhaust:
2x Meanwell APV-8-12 (0.67 amp, 12 volt drivers)
2x Cooler Master R4-S2S-124K-GP packs (4x 120mm 0.16 amp, 12 volt fans per pack)

[DaveJonesFan]

Going to expand on this build with another EB Gen 2 light that will cover 2 shelves with 1 driver, run without heatsinks, since Arrow has a bit of a summer sale going, and this seems like a great bang for the buck build maintaining a good efficiency on the driver, albeit a high price per watt for said driver, after looking at HLG40 kits and such for a potential solution.

Meanwell HLG-120H-C700B
Bourns 3590S-2-104L (testing these against the RapidLED 350K ohm cased pots)
3x BXEB-L1120Z-35E4000-C-B3 [3500K 1120mm EB Gen 2 (Arrow price drop on these color temp)]
2x BXEB-L1120Z-50E4000-C-B3 (5000K 1120mm EB Gen 2)

Running all 5 of the 4 footers in series for a total 195v, 136.5 + watts max.

Will be using 3 strips (3500K, 5000K, 3500K stagger) on the second shelf from the top below the current light setup, as lowish clearance early veg space. 82 watts max across the 4'x1.5' space.

then the other 2 strips (3500K, 5000K) on shelf below for an ultra low clearance area for 2 clone domes run lengthwise in the 4'x1.5' shelf. 55 watts max.

This will be replacing a single shelf of 3x bridgelux/epileds higrow panels which seemed like a fair solution for low clearance not that long ago.

https://www.amazon.com/HIGROW-6-Band-Sp ... 978&sr=8-7

Those babies run over 100 watts as a triplet and now I'm noticing they claim only 31 something lumens per watt! The blurps have got to go!