Inside LED bulb

TESS, a Taiwanese manufacturing company, recently introduced a 7W LED bulb that, at 560 lumens, can serve as a replacement for a typical 500-lumen, 40W incandescent bulb. Tear-down: inside a 7W LED light bulb article shows you what is inside that lamp. This LED lamp bulb holds seven 1W LED packages (a package of multiple LED chips). The HB-LED-driver IC is an MIP552 from Panasonic.

The LEDs have advanced so much that in the future such builb could be built using only one LED. According to Prosessori magazine news article a single Cree XLamp XM led can produce 750 lumens (equivalend to 60W bulb) with 7W of power. 160 lm/W is expected from cool white variants.

For DIY LED experimenters here are some tips:
Home Built LED Lighting article tells the basics of LED light circuits.
Ultra Bright LED Lamp article show a circuit of a ultra-bright white LED lamp that works on 230V AC with minimal power consumption. This circuit uses 16 LEDs and a capacitor for LED current limiting.
Efficient LED power supply has battery backup article shows a highly efficient and reliable design for emergency LED lighting at 3 to 6W. The circuit’s input is 12V ac.
If you don’t want to build the LED driver circuit from components then you can buy a good selection of LED driver modules from Dealextreme.


  1. energy star led lighting list says:

    As I inched along, I slowly passed the local gasoline refinery.
    Their recycling program is one of the largest, yielding more
    than 10,000 pounds of old lights for recycling each year.
    The capacity of circuits in a house can usually be determined
    by looking at the rating of circuit breakers or fuses used.

  2. wiecej tutaj says:

    You actually make it seem really easy together with your
    presentation however I to find this topic to be actually something that
    I think I would by no means understand. It kind of feels too complex and very vast for me.
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  3. Tomi Engdahl says:

    Teardown: A19 LED bulb–A19-LED-bulb

    Reaching the power circuit of this bulb required destroying the base, nothing you can’t do with a screwdriver and a wire cutter.

    Finally, there’s U1, an AP1910 Universal High Brightness LED Driver Controller.

  4. tomi says:

    Do not buy Free Energy Blueprint advertised on the previous comment.
    This kind of plans just don’t work as promised.


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