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led board white

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led board white Customers Reviews

  • Quick electric test of 28-LED PCB

    posted by MarcoWink

    Compared to small emitters (10W, 20W) on metal board, this one has a much larger area, so cooling is more convenient and less critical wrt thermal conductivity.
    All leds appear to have same light intensity, aluminum PCB will make sure temperature is about the same over the board, which is important.
    Price per lumen, convenient.
    - heatsink/PCB is large enough to enable to run the light without additional cooling till about ~5W (0.25A, 20.5V)
    - I made some quick measurements, the PCB appears to have a Rth of about 4K/W. At 10W end temp of PCB was 60 C, at room temperature (not recommended for permanent use), note that in a ceiling fixture environment temperatures will be higher.
    - Note that when temperature of the leds increases, current increases with same voltage, so use a real current source in stead of voltage source to stay save!
    - you could cut (saw) the PCB if you need another voltage!
    "2800" lumen for 20 USD is good offer, convenient module.
  • Powerful light

    posted by albertcfont

    pure white and very powerful light. Compact. I'll use it for an aquarium daylight. I'm happy with this LED board but it's a little bit expensive for beien a DX one
    Maybe it could cost a few dollars less, but it covers all my needs
    Do not forget to add extra heatsink, it gets really, really hot!
  • Good for the price, but doesn't match the spec

    posted by rosenanastasov

    Efficient LEDs. Easy to use also. Works flawless even on higher current (I tested them on ~1A) with proper cooling.
    Would be very nice if they matched the description about the color temperature. Since the LEDs are not marked with any code I suppose there is a chance that my order somehow got mistaken.
    Good for the price. Easy to use. Provide a lot of light. But get a sample first to check the color index.
  • Works great

    posted by Woodbin

    Great colorsEasy to useGood refresh rateCompactRGB matrix can be disconnected and used separately
    Uses all arduino IO pins (actually it doesn't, there are few unused pins still available, one can rewire the shield or use an sensor shield to get them)
    This thing is great. Using the Colorduino library, anybody can quickly make this beast shine with colors and pictures. It's fast to work with, easy to setup and once you get into Colorduino library, it's very easy to make some really nice things (the example Plasma code is great).
  • Would get one again

    posted by thanar

    Bright as the sun, and of a really nice warm white color, no noticeable strange hues.
    This is my first emitter for a DIY project. More specifically, I had an Energizer lantern around that thought it would be better off with a LED lamp. Did not use any driver or additional electronic parts, the lantern is powered by 3x1.5V batteries, could be too much for the emitter if the batteries are new, time will tell.
    I would definitely get a new one if some new batteries toast this baby, since 4.5V is quite more than the rated 3.4V.

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