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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: how many MCD for leds to replace dash globes.
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Sun, 14 December 2003 14:07
 
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true different colours appear different brightness, but also has to do with the 'angle of viewing' etc.
LED's are monochromatic, so usually ONLY have light emitted in the visible spectrum.
incandesecnts give off full range of light (infrared, heat etc) as mentioned in the tech article on the site i posted above.
as they also mention, LED's are rated by 'on axis' measurements which are in candelas, whereas incandescents are measured in Lumens, which is a 360 degree measurement... an LED rating in Lumens will not reflect the actual viewing brightness, particularly if it has a small viewing angle
SBS, they look SHIIIIINY!!!!!!
heh heh, i had to put foil in my KE15's cluster to get ANY light coming to the dials 
Cya, Stewart
| Toobs wrote on Sun, 14 December 2003 23:01 |
One other thing to remember is that LED's of different colours will have a different brightness even though their MCD rating may be the same. This is because a lot of the light emitted by an LED may be out of the visible range. The best example is to compare a 20,000MCD red LED against a 5000MCD blue LED... The blue LED appears brighter than the red because a lot of the light from the red LED is out of the visible range (e.g. Infra Red)
If you are able to obtain the lumens (or ANSI lumems [Al]) value of the LED's you are looking for you will find that you can compare brightnesses of different coloured LED's more effectively.
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| | Subject | Poster | Date |
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how many MCD for leds to replace dash globes.
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Grega | Sun, 14 December 2003 05:33 |
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Re: how many MCD for leds to replace dash globes.
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oldcorollas | Sun, 14 December 2003 06:47 |
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Re: how many MCD for leds to replace dash globes.
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oldcorollas | Sun, 14 December 2003 06:53 |
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Re: how many MCD for leds to replace dash globes.
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thechuckster | Sun, 14 December 2003 07:42 |
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Re: how many MCD for leds to replace dash globes.
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midnight | Sun, 14 December 2003 07:59 |
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Re: how many MCD for leds to replace dash globes.
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Soarer | Sun, 14 December 2003 10:13 |
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Re: how many MCD for leds to replace dash globes.
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gabe | Sun, 14 December 2003 10:20 |
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Re: how many MCD for leds to replace dash globes.
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Grega | Sun, 14 December 2003 10:49 |
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Re: how many MCD for leds to replace dash globes.
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Allan | Sun, 14 December 2003 11:44 |
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Re: how many MCD for leds to replace dash globes.
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Toobs | Sun, 14 December 2003 12:01 |
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Re: how many MCD for leds to replace dash globes.
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shinybluesteel | Sun, 14 December 2003 13:00 |
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Re: how many MCD for leds to replace dash globes.
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oldcorollas | Sun, 14 December 2003 14:07 |
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Re: how many MCD for leds to replace dash globes.
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shinybluesteel | Sun, 14 December 2003 22:09 |
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Re: how many MCD for leds to replace dash globes.
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M.W.P. | Mon, 15 December 2003 02:38 |
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Re: how many MCD for leds to replace dash globes.
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midnight | Mon, 15 December 2003 06:06 |
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Re: how many MCD for leds to replace dash globes.
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Grega | Mon, 15 December 2003 10:02 |
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Re: how many MCD for leds to replace dash globes.
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midnight | Mon, 15 December 2003 11:20 |
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Re: how many MCD for leds to replace dash globes.
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Grega | Mon, 15 December 2003 19:11 |
