Incandescent lights

On 02/06/2015 10:15 AM, js at cimmeri.com wrote: OK, here's a bad picture of my first retrofit, 10 Cree 1W lamps and a home-made power supply. The fluorescent tube retrofits are made on strips of 2" wide PC board material. I have some left over from an old project, so cut it into 2" strips 22" long. I cut little grooves in the copper to make 11 2 x 2" squares, and check with a meter that they are isolated. I then solder 10 Cree XPEBWT-01-0000-00CC2 LEDs across the grooves. Then, I solder a pair of these strips in series to make a 20 LED string. I need to make a picture of this next time I'm in there, or make another unit (which is on the to-do list). I use an LED Supply LED25W-72-C0350 power supply from Digi-Key to power it. These units have been running in a flush drop-ceiling fixture for almost a year now, and are still doing very well. The 10-LED job has been running almost 2 years, now. These things are NOT cheap, but I'm expecting to get better life than most of the commercial units, which I think have crummy thermal design. I think they work out well. Jon