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  • A bit weaker than 5W Incan

    posted by eatatjoes10 on 04/13/2011

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


    - takes very low power, it uses only 29mA @ 12V / 43mA @ 13,5V, that means 0,35W @ 12V / 0,58W @ 13,5V.

    - saves one or two drops of gas ;-)

    - very white light

    - easy to install

    - lasts a while longer than incans (I hope)


    - not 0,9W, only 0,35W @ 12V / 0,58W @ 13,5V

    - maybe a bit too white?

    - no +/- marking (who cares)

    - light only directed to one side

    - a bit weaker than a 5W incan bulb


    I compared the brightness in my DIY- Ulbricht- sphere:

    my old 5W incan- bulb gives a reading of 480lux/800lux at 12V/13,5V at 4,1W/4,9W. This LED- bulb gives me 480lux/650lux at 0,35W/0,58W, so it is a bit weaker, but will do it's job in my car's glove compartment perfectly. Due to the whiter output I think it will look even brighter than the old incan- bulb.

    Two 200ohm resistors in parallel (why not one single 100ohm?? Redundancy?) limit the current to the LEDs to 43mA max at 13,5V, that's 3,03V/3,07V per LED at 12V/13,5V, should be fine.

    I don't understand why they overrate the power (0,9W instead of only 0,6W). For a LED it is better to consume less power if it can replace an incan bulb, and this can really replace a 5W, if the incan does not use a reflector.


    Very good replacement for a 5W incan that is used without a reflector. The output is nearly the same as the incan at one side, but much more white. If the incan is used in a reflective environment this 3 LED bulb will be too weak to fully replace it.

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