what are you hobbies besides R/C?

[BrianG]

Couldn't you use tinted plastic to get the color you want?

LEDs are nice, especially for flashlights. More power goes to providing light than heat, last longer, and mechanically sound. I don't know how many times I dropped a regular light and broke the filament.

Recently, I picked up a bunch of 5mm white LEDs to play with. I then made a switching power supply (converts 12vDC to ~60v DC) and ran 5 strings of 16 series-connected LEDs with a 25mA constant current circuit for each string. Got the switcher to be right at 83% efficient, which wasn't too bad considering. Makes a neat bench light for the track pit.

[Dafni]

Speaking of LEDs, I just finished an RC18 Body for a mate with LEDs and all. Those new white LEDs are amazing! Little lasers almost.

[ICUBoy]

Originally Posted by BrianG

Couldn't you use tinted plastic to get the color you want?
:

Yeah the problem is white LEDs are not white- they are blue and yellow in a ratio that tricks your eye- try shining them on a red object and you'll see what's missing. A filter won't help, but true RBG high-power LEDs are on the way...
You're right about the efficiency: high and getting higher!