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20mm led

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20mm led Customers Reviews

  • 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.
  • Great red light

    posted by Lollerkopter

    It's great bright red light.Easy install method, thanks to the PCB star.
    I think, this is Cree XR-C LED.I bought this to build a good and bright bicycle tail light.When the drive current is 100mA, the LED is stays cool (minimal heatsink is enough) and emits very very bright light. It's blinding the eyes in the dark night. If you use this for tail light, higher drive current is not necessary. If the drive current is higher than 100-200mA, more light emitting, more heat generating, and peoples becomes angry.
    It's work fine, ideal for tail light.
  • Whoa!

    posted by gm___

    This is a seriously bright source of IR!Cheap for what it puts out. Don't bother with arrays of 5mm IR LEDs when you can have one of these!
    Use one of these for an IR remote!

    I put one of them on a breadboard and the camera couldn't see anything within a 30cm radius, it was so much IR.

    Good for night vision stuff. IR sensitive camera + one of these = some fun.

    Drive at 1.7v with 300ma.
    Buy this.

    Wait, buy two of these. Or three.
  • Cheap and very bright

    posted by imprtvizion

    Great little Cree emitter, its a lot smaller than it looks. The whole base is only about the size of a penny. Not to mention the emitter which is extremely smaller than a grain of rice. Which is really impressive that a little thing like that can light up an entire bedroom. I compared it to my other cree Q5 sku 13974. With this LED there beam is nice and round not much artifacts like my other Q5. This emitter emits a much lighter shade of white then my Q5 XR-E emitter. Build quality is very good, I can't see how it could be made better. Emitter is deal center on the base. If you're thinking about trying to make an XPE emitter this would be a perfect buy. For a little over 5 dollars USD how can you lose for a Q5. DX wrapped the emitter pretty good with bubble wrap. I couldn't even tell what was in there until I undid all the bubble wrap. I currently have this emitter in an a 13 LED husky flashlight body that had blown LEDs a week after I bought it. Right now its all flood and no throw, but it works pretty wells as a flood flashlight. Although that is not my intention for this emitter. Its emitting just fine but, now I need to get a nice reflector for it so, it'll have a good throw beam and a nice acrylic lens, so it doesn't look like a naked DIY flashlight and I'll be all set.
    This Cree emitter is the best emitter I've owned so far, it would make one crazy super flashlight if someone were to put three of them into a full sized flashlight. Or it would make one really bright bike LED. Its got a good amount of light cheaper than XR-E, so just go ahead and buy one and try it out. Just make sure to get this one and not the little round XPE emitter base one. That one is even smaller than this one.
  • Sunglasses on

    posted by spikey8

    Single chip so you need only one lens
    Compact so it can replace XR-E
    Massive white light output (4 times XR-E)
    Comes on individual wired star that is thick so seems to be a good heatsink
    Has very low Vf
    It would be much better to let the user decide die configuration so make it individual.
    Much easier to solder pins together than to decouple them using desoldering wick
    didn't try to direct drive it to 18650
    temporarily mounted to a big heatsink
    UI characteristic (one die)
    If (A) Vf (V)
    0.005 2,44
    0.02 2.66
    0.05 2.77
    0.1 2.87
    0.2 3.04
    0.35 3.13
    0.6 3.32
    0.7 3.35
    0.8 3.41
    Great for own DIY projects or flashlight upgrade

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