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  #21  
Old 02-22-2013, 12:14 PM
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red is lights, blue is additional lights
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  #22  
Old 02-22-2013, 12:16 PM
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you can put as many lights as you please, just do a mock up first so you can see what looks good to you. Use cardboard, a pencil will easily punch through a small hole so you can puch the lights in snuggly, easy to trim/cut/fit so you get a nice template as well.
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Old 02-22-2013, 12:20 PM
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Old 02-22-2013, 12:41 PM
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LOL ^

Great idea on the cardboard.

Quote:
A little simpler would be.... if you had 20 lights total, half would run as regular running lights, when you apply the brakes the other half will light up increasing the amount of light. You can mix them together in one area like a dual filament bulb or seperate them like a 2 bulb setup. I will try and do a drawing as well.
That's exactly what I was trying to describe.

Whatever Sean.... (rolls eyes)
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Old 02-25-2013, 09:40 AM
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So how come the recommendation to use red LED's with a red lens? Aren't tail light bulbs clear/white?
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Old 02-25-2013, 11:56 AM
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Quote:
Originally Posted by snrusnak View Post
So how come the recommendation to use red LED's with a red lens? Aren't tail light bulbs clear/white?

The red lens cannot absorb the red light and will appear brighter, where the white light, the white has all spectrums of the light and some are absorbed in the color of the lens.
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Old 02-25-2013, 11:57 AM
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Quote:
Originally Posted by snrusnak View Post
So how come the recommendation to use red LED's with a red lens? Aren't tail light bulbs clear/white?
and.... if you ps someone off, and they bust out your tail lights, they will still be red...lol
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Old 02-25-2013, 12:00 PM
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just a clip from a site about LEDs
LEDs are remarkably good at producing single-color light. It's what they do best. Making "white" LEDs was something of a challenge. Some LEDs did this by using multiple LEDs (red, green, and yellow, say), but the commonest way was to add a fluorescent material that absorbed some of the lower-wavelength light (almost invariably blue) and re-emitted it in a broad band across the visible. It works sorta well, although the light has a perceptible blue tinge. And the fluorescent material tends to degrade with time, leaving you with a mostly blue LED.


When you put a white LED behind a colored filter, then, assuming the filter peaks in the red and doesn't have a high transmission elsewhere, you're taking blue light from the LED, converting it to a host of other colors (with some loss, inevitably), and letting only the red portion through.

Whereas if you use a red LED, you're pretty much transmitting almost all of the light that comes out of the LED.


No contest -- using a red LED behind a red filter is WAYYYYYY more efficient than putting a white LED behind it.


This is true even if you use multiple LEDs -- the light from the green and the yellow LED will mostly get filtered out, and only the light from the red one comes through. It's as if you only had the red one back there to begin with, anyway.










On top of all this, as a rule of thumb the longer the wavelength of the LED, the more efficient it is. Red LEDs are more efficient than green, yellow, or blue at converting the electricity into light. There have been improvemernts in LEDs through the years, but that's still pretty true.
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  #29  
Old 02-25-2013, 12:33 PM
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WOW thanks for the info! lol. Ok so looks like I'm after just red and amber LED's. I'm going to make a template for the design I want before moving forward.
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