Author Topic: GE reveal incandescant lamp  (Read 2676 times)
KEDER
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GE reveal incandescant lamp « on: June 05, 2009, 03:28:56 PM » Author: KEDER
Hmm, why do they make reveal incandescent lamps if you can just get a compact florescent that does much whiter light? Cause you still see a yellow tint on those lights. We have some of those in our house, and i noticed they dont do white light well. just a bit better than regular incandescent bulb. And all the reveal GE lamps just have a bluish coding around the glass. nothing different in the bulb.
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Silverliner
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Re: GE reveal incandescant lamp « Reply #1 on: June 05, 2009, 06:01:04 PM » Author: Silverliner
Most people actually like the warm color. The Reveals are meant to still provide a warm color, just a bit whiter. Daylight CFLs are considered too cold for most peoples' tastes. A few in my city did buy them to light their houses tho.
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Re: GE reveal incandescant lamp « Reply #2 on: June 05, 2009, 08:35:23 PM » Author: lightman64
Reveals have a Full Color Spectrum meaning that everything looks better under its light. They are good for room that is very colorful.
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Re: GE reveal incandescant lamp « Reply #3 on: June 05, 2009, 08:59:54 PM » Author: KEDER
I have 3 daylight CFL's in my room. they resemble (extremely close!) sunlight. its is very white. and (to my eye) looks exactly like sunlight. (a bad thing about my eye is that im red-green colorblind =( i wish i saw normal colors =( )
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Re: GE reveal incandescant lamp « Reply #4 on: July 23, 2009, 05:27:21 AM » Author: jason_m
Actually Reveal incandescent lamps have a spectrum hole.  They are nothing special: You put on a filter, and it blocks out a portion of spectrum.  They can make colors appear brighter or "pop" becuase of a distortion effect of the spectum hole.  The spectrum hole is basically in yellow/yellow-orange light, but things that are yellow in color still reflect the red and green light on either side of the specrum hole.  Things that are red or green reflect the red or green light directly and are not mixing in any yellow light due to the spectrum hole.  This distortion effect is similar to cfl's.  They are no not full spectrum by any means.
« Last Edit: July 23, 2009, 05:37:19 AM by jason_m » Logged
Medved
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Re: GE reveal incandescant lamp « Reply #5 on: July 23, 2009, 11:55:18 AM » Author: Medved
Yellow is the wavelength mostly responsible for perceived glare. It lies on the "red" side of the eye sensitivity curve, while this curve shifts to red for higher intensity, while this shift make yellow more intensive, what closes the eye iris, so everything look's darker (and that's the principle of glare). The yellow is the mostly sensitive for these shifts and moreover the shift goes in wrong direction.
So if you avoid yellow, you trick the eye to stay open, allowing more other light to pass in, so everything look brighter and more colorful.
The same mechanism cause the relative (for given lamp lumen output) poor visibility under sodium lights, compare to cool white lamps (e.g. MV) - on low level, so when looking to illuminated objects, the curve shift to blue, so they appear dark, while when the lamp is in view, it's brightness shift the curve towards red and make the lamp appearing much brighter.


Actually Reveal incandescent lamps have a spectrum hole.  They are nothing special: You put on a filter, and it blocks out a portion of spectrum.  They can make colors appear brighter or "pop" becuase of a distortion effect of the spectum hole.  The spectrum hole is basically in yellow/yellow-orange light, but things that are yellow in color still reflect the red and green light on either side of the specrum hole.  Things that are red or green reflect the red or green light directly and are not mixing in any yellow light due to the spectrum hole.  This distortion effect is similar to cfl's.  They are no not full spectrum by any means.
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Re: GE reveal incandescant lamp « Reply #6 on: July 26, 2009, 12:51:45 AM » Author: icefoglights
The coating on the bulbs attenuates the yellow light output of the filament.  It's still a complete spectrum that allows a CRI of 100.  Also, reveals can be used with dimmers and frequently switched lights (like a bathroom) where CFLs might not be as desirable.  At this time it's still hard to find dimmable CFLs in other than soft white.

The flip side is since the yellow output is attenuated, and that being around the peak of perceived light of an incandescent lamp, efficiency drops.
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