LEDgardener

Glad to see you have your very own forum now: you deserve to have some of the burden taken off your shoulders now that we can discuss as a community! I'd also like to thank you one last time for making and updating your COB+Driver spreadsheet; it is such an useful resource for playing around with configurations or as a quick reference to the pertinent specs of a driver.


Alright, I plan on expanding my very limited grow space by utilizing the area under my sink; I will be moving my two R.O. tanks to a shelf on the wall, and will have a space of roughly 30"x42"x42" (L x W x H; inches).

I went ahead and ordered (6) SI-B8T05128HUS from Digikey and they should be here this week. I have two HLG-240H-1050b drivers laying around that I plan to use to power these strips.
The Forward Voltage of each strip is 22.5V, and the drivers max is 238V (is this to compensate on the +/-1% tolerance?), so I should be able to run 10 strips per driver.

Considering I made the mistake of only ordering (6) strips as I thought that was enough to sufficiently illuminate my small space for seedlings, I am now wondering if there are any special considerations I should take into how these strips are wired together. I had planned to wire these in series, as that is what I'm (barely) familiar with, but I'm open to trying a parallel setup using one or two drivers.


Item List:
(6) SI-B8T05128HUS
(2) MeanWell HLG-240H-1050b
Going to acquire Aluminum strips for heatsinks

Hey man, thanks for registering.

Absolute max current for each of those strips is 600 mA so with 6 strips you're going to have to parallel at least 2 together per group. If you do 2 per group, you'll be pushing 175mA per diode which is 88% of max. You'll probably want to dim them a little to be safe.

Only potential problem I see is that if you have 3 groups of 2 strips, that's only 72V and the minimum for constant current range on that driver is 119-238V. Checking the test report for that driver though, the constant current region extended all the way down from 237V to .3V.

I don't know if the company that hosts this site offers you stats on which pages are viewed and how often - but the stats for the page with the COB @ mA to Driver selector must appear to the algorithm tracking the stats as a DDoS attack, I'm on there so often!

Lol. I use it a ton myself too.

Hmmm, so I been reading through your lm561c post and it seems to me that I need at least 4 or 5 pairs of strips to effectively utilize this driver. I went ahead and ordered four more strips.

With 10 strips total, 5 groups of 2 would probably be the way to go, and then dim the driver a little.