I want to replace the dash bulbs in my car with LED's. Only ones I've got lying around are ultra bright red LEDs - but the speedo/rev counter clocks have a green film over the bulb housing. What colour would I end up with red LEDs' shining through a green film/filter? Thanks in advance!
None as in no light; the green filter only lets green light through, the red LEDs have no green light. It doesn't work that perfectly in the real world but I reckon they'd be too dim to see.
This is correct, in theory. In practice, your filter probably won't block enough light transmission to be truly effective and really cause much of a transformation. When I hold a red gel up in front of my face, I get more of a red-tinted greyscale when looking at my monitor, with the redder parts of the screen being brightest. But part of that is your eyes internal white balance playing tricks on you. Parts of the screen that are pure blue or pure green go effectively black with the red gel in front of them; expect the reverse to also hold true if you've got a very rich green filter/gel in front of a red LED.
Cant be that hard, there are walkthroughs online for my car (mazda 3) to do exactly that. You take off the red film and then can put in any color led. the blue ones look nice.
Oh why not just get hold of some green LED's? They're not exactly expensive or difficult to get hold of, thus negating any need to remove the film etc.
I think you'll see the red at least where it's close to an led, and the color will fade and dim through yellow/orange to black as you get further from the led, if the gaps are big enough. So it would kinda look like bad vomit or something like that! If this green layer is painted and can't be removed, then just get green or aqua leds. The green filter only wants to let green through, so any color other than green is reduced. You'd have to put more blue leds in there than the standard number of lights to get blue, or alot more red leds in to get red. If the green layer can be removed, take it out, choose whatever color leds you want, and be happy
very bright green ones are actually pretty expensive. I'm sure some guy in china sell them dirt cheap on eBay, though.
Did it with the reds. Gonna go back and replace the MFA bulb with a bright white one so it's bright green. Looks a lot brighter in reality. Obviously. Kind of has that 'submarine under attack look' to it now.
