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240 Volts 100 Hertz 29 LED lamp 2010-07-05

This is the improved version of the LED lamp posted about 1 year ago which ran on half wave rectified dc directly from the 240 Volts mains.

As I test my projects thoroughly and want to ensure a good reliability of the project a long time 2000 hours duration run is done prior to posting the details on the web.
Again, I have choosen for the resistive option because it is more reliable than a capacitor voltage dropper.

Parts required:

29 x White LED's
6 x 2k2 1Watt resistors
4 x 1N4007 diodes
small piece of vero board
discarded CFL lamp base

Photo's attached with assembly details.

Calculations in part 2 of this thread.
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