I was playing around with the same idea, using blue LEDs. I took 2 white LEDs and the blue covers out of a high beam indicator in some old gauge clusters I had. I got half way through and decided that red was much easier. I went to kinkos and bought one of those red plastic presentation binders. I am sure they have blue, you might have to test bulbs to find one that is bright enough.
Mark Diederich 86 GLi wolf 2.0 p.s. Ever wonder why they have red filters on army flashlights? Red doesnt kill your night vision... My dad was telling me stories of when he used to drive a tank and their night vision exercises. So I chaged my lights to red.... and just to play around I put a red bulb in the dome and let him drive.... "I feel like I am in a Frence whorehouse" to this day that is the funniest thing I have ever heard come out of my dads mouth. > It's not that easy to make good blue gauge lights. I guess it's because the > stock bulbs, being regular incadescent bulbs, put out most of their light > in > the yellow part of the spectrum, and very little at the blue end. That's OK > with the stock green filter, and fine with a red filter, but too dim when > you > use a deep blue one. > > I ended up using four bright white LEDs and a blue filter for my cluster > -- > two LEDs in the stock positions, and two more mounted in the white plastic > housing, pointed straight at the gauges. And two more AlInGaP (= very > bright!) red LEDs for the clock backlight. > > Cheers, >
