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[isenhart]

Curiosity question, why did you choose to go with a 48v power supply instead of a 12v?

[SantaMonica]

Did you tighten the screws? They should be able to tighten down as much as needed. The last video here shows it:

Videos:

GEM5 lights everywhere:
https://youtu.be/-jWxVHqb71Y

GEM5 lights used for algae/cheato reactors:
https://youtu.be/nqmxgx4vPwA

GEM5 power supply handles Four (4) lights:
https://youtu.be/hcb11Cm0e7k

GEM5 power cord for 240 and 120 volts:
https://youtu.be/P2skBB9PwMw

GEM5 suction cups:
https://youtu.be/miewM3A0EEM

[SantaMonica]

Because the lights are in series.

[isenhart]

Right, but if they were 12 volt in parallel you wouldn't need the caps to make them work if you run less than 4.

[SantaMonica]

LEDs can't work like that. They vary too much and one of them ends up taking all the power.

[C3hutson]

Here's five days of growth. First time growing from a cleaned screen with the LEDs. I think I need to cut down the hours a little bit. Appears to be growing best well outside of the focus of the LEDs. This is 18 LED photoperiod.

[SantaMonica]

Yes or back the lights away more.

Last of the test lights done: #47, 48, 52, 53 going out Monday to Pny.

[SantaMonica]

Non-USA lights went by our slow first class mail, so they might take a while.

[FullBoreReefer]

Got my lights about 3-4days ago. I found time the other night to remove my old "eBay" lights and install these. Installation was a breeze, suction cup to the side of my bucket, plugged the light into the power supply, and then into my apex. When I tested them, the first I noticed was the spectrum. My old light had some blues with the Reds so it gave it a pink'ish purple look, these are definitely red!

Here are some pics...









I'll report back after I give it a few weeks.

[C3hutson]

they are really really red. Really bright. If I look at my scrubber at night it takes a second for me to regain vision when I look away, and that's just the light reflecting off the screen.