nospamgoingjag wrote:

Hope this is an appropriate request for this newsgroup.

I have an LED trouble light (as in for working on a car). It is the
style with buld LED's.

I used some Cree 1 W white LEDs from Digi-Key
($1.70 each in small quantity) and put 10 in series. I used a 36
V AC or so transformer, rectifier and filter cap, and built the
LM3404HV reference circuit to deliver 300 mA to the string. This
has worked well, and 10 of these lamps are OUTRAGEOUSLY bright!
In fact, you need a diffuser, or you will be temporarily blinded
if you look at them! The 10 LEDs at 300 mA is about 9 W, but it
is almost as much light as a single 48" fluorescent tube, and brightly
illuminates our pantry/laundry area at home, which was horribly dim
with a 60 W incandescent. (Due to the particular ceiling fixture
there, no CFL would fit.)

The only problem with this plan is to find a 10 W transformer that
can fit inside your trouble light handle.

Jon