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    Need information about these kind of high power leds.

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    Hi guys. I am in the process of making a led bar lamp that uses these high power leds (10w each!). By the way, they do cost around $1 each one, very cheap!
    I need to know if these leds do need a resistor in series, or if I should connect it directly to the 12V. They do work with 12V, but I have no information about if they do need a resistor, just like all the regular leds. Thanks.



    Here I put the specs

    - LED Emitter: 10W

    - Output Lumens: 900 Lumens

    - DC Forward Voltage (VF) :9-12 V DC

    - DC Forward Currect (IF) : 900mA

    - Color Temp: 5500 ~6200K (CoolWhite)

    - Beam Angle: 140 degrees

    - LifeSpan Time : > 50,000 hours
    Last edited by Johanx2; 15th December 2012 at 11:40.

    •   Alt15th December 2012, 10:57

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  2. #2
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    Re: Need information about these kind of high power leds.

    They need a resistor or even better, constant current source. If you connect 12V directly across them they will almost certainly die very quickly!

    Brian.
    PLEASE - no friends requests or private emails, I simply don't have time to reply to them all.
    It's better to share your questions and answers on Edaboard so we can all benefit from each others experiences.



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