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  • Warm white sun

    posted by bozzzzo on 04/17/2014
    9

    Involvement:General (knows how to use it) - Ownership:1 week to 1 month

    Pros:

    Bright! The light gives off a pleasant warm white.
    Made a ceiling lamp from five of these and it's almost too bright.
    The shape of the element is especially suitable for making of light sticks suspended from ceiling.

    Cons:

    none, really

    OtherThoughts:

    These LED lights require mandatory cooling. You need to make sure to keep the LED element under 50C to maintain low current consumption. At 100C the current doubles, but emitted light stays the same. You need to provide about 100cm2 cooling surface per lamp of minimum thickness 2mm. Use silicone heat paste to improve heat transfer. A viable option is 30mm square aluminum tube with 2mm wall thickness, allow about 20cm of the tube per LED light, 5 elements per meter, temperature stays about 45C (25C over ambient)

    Bottomline:

    The prototype worked out excellent. Just bought more elements for two more lamps.

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