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Thread: Register for free GEM5 test lights

  1. #61

    Join Date
    Jan 2015
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    USA
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    96
    Curiosity question, why did you choose to go with a 48v power supply instead of a 12v?

  2. #62
    Super Moderator
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    Oct 2008
    Location
    Santa Monica, CA, USA
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    9,762
    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

  3. #63
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    Because the lights are in series.

  4. #64

    Join Date
    Jan 2015
    Location
    USA
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    96
    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.

  5. #65
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    Oct 2008
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    LEDs can't work like that. They vary too much and one of them ends up taking all the power.

  6. #66

    Join Date
    May 2016
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    USA
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    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.


  7. #67
    Super Moderator
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    Yes or back the lights away more.

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

  8. #68
    Super Moderator
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    Oct 2008
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    Non-USA lights went by our slow first class mail, so they might take a while.

  9. #69

    Join Date
    May 2016
    Location
    USA
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    6
    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.

  10. #70

    Join Date
    May 2016
    Location
    USA
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    28
    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.

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