DX » Community » Reviews » G4 1.2W 108-Lumen 3500K 24-SMD LED Car Warm White Light Bulb (DC 12V)
4.7
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  • Not quite halogen, but pretty good.

    posted by iksbob on 07/12/2011
    0

    Involvement:Expert (understands the inner workings) - Ownership:less than 1 day

    Pros:

    Warm white, though it seems tan compared to halogen's yellow... Color rendering seems slightly reduced in a direct comparison.

    Low power draw. (measured about 100mA @ 12V)

    Construction seems pretty solid.

    The emitters are set up as 8 groups of 3 LEDs, with a current-limiting resistor for each group. That means if one LED fails, it will also disable the other 2 in its group, but the remaining 21 LEDs will be unaffected.

    Cons:

    Out of the 5 modules I ordered, one had a cluster of 3 LEDs that are DOA.

    The units run hot at 12VDC. After operating for 5 minutes in open air, the PCB and emitters are up to 76°C (170°F). This seems excessive, and makes me wonder about the life span of the design. Even more so if the units are used in a closed fixture.

    OtherThoughts:

    I bought these to use as interior lighting in my car, but they seem to need some tinkering (higher value resistors maybe) to be reliable for that.

    Bottomline:

    They're bright, but seem to be overdriven.

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