Originally Posted by XXXX
white light is not better to see with... there are no facts from any credible scientist that will support the claim and it's all in your head.
any bulb with a tint on it won't be brighter it just shades out the other colors (less actual light).
yellow and green light are the best spectrum's to see in and you just blocked them
You sir, are incorrect about white LED's being less bright than other forms of LED. Yes tinted filament bulbs block out light which lowers the observed lumen of any filament bulb, but LED's work with a luminescence and phosphorescence emission that is not in any way similar to a filament light bulb. The phosphor "blocks" the waves emitted, but it releases the energy it absorbs in another part of the light spectrum. Think glow paint. In some cases this efficiency surpasses even CCFL's that emit white. The trick with LED's is getting enough power into the thing in a fairly stable fashion without blowing it out.
White light is actually an amalgamation of all of the colors of the spectrum that our cones can see mixed together. So this is why it is difficult to make perfectly white light, you need a material to emit at least three high peaks of light.
Anyways, if you look at a LED spectrum chart for a typical non RGB white LED this is what the white light is made of:
As you can see white LED's actually throw off a fair bit of light in the yellow and green portions of the spectrum. There area's that white LED's are weak at emitting is the 500 nm trough (light blue/turquoise) and anything over about 600 nm (orange and red). While blue is the largest luminous source total luminescence is achieved by spiking all three of the cone types that our eye's see, hence our minds perceive it as white.
A yellow LED phosphor will give similar output to a white phosphor, all depending on the efficiency of the phosphor chosen of course. Most original LED blubs where red since that was the most efficient color. Now all colors can be made relatively efficiently using phosphors, other than purple. Right now the hardest primary color to get a good yield from is blue, hence why blue LED's are not common in lighting applications. That being on top of the fact that perceptively cool colors are not as well translated by our brains in dark environments.