white LED drive from 12V -- 2

Here is another of my 12V LED projects.

This circuit is useful to while driving a large number of white LEDs at 12V as it reduces part count.

I am posting this as an original circuit as I could not find a similar one on the net till date.

I am using 3X10 White LEDs on this circuit and have found performance to be reliable -- no string dead so far yet and brightness OK too.