HID vs white light bulbs

[underc35a]

http://www.danielsternlighting.com/t...blue/blue.html


Quote from the article:

"White light is made up of every color of light mixed together. But the colors are not all present in equal amounts. The output spectrum of filament bulbs, including halogen headlamp bulbs, includes a great deal of red, orange, yellow and green light, but very little blue or violet light. Blue bulbs have colored glass (or a filter coating applied to clear glass) that allows only the blue light through the filter — this is why the bulbs appear blue. Because very little blue light is produced by a halogen bulb in the first place, it is only this very small amount — a tiny fraction of the total amount of light produced by a halogen bulb filament — that ever reaches the road."

[Muzz]

http://www.danielsternlighting.com/t...blue/blue.html


Quote from the article:

"White light is made up of every color of light mixed together. But the colors are not all present in equal amounts. The output spectrum of filament bulbs, including halogen headlamp bulbs, includes a great deal of red, orange, yellow and green light, but very little blue or violet light. Blue bulbs have colored glass (or a filter coating applied to clear glass) that allows only the blue light through the filter — this is why the bulbs appear blue. Because very little blue light is produced by a halogen bulb in the first place, it is only this very small amount — a tiny fraction of the total amount of light produced by a halogen bulb filament — that ever reaches the road."

Adding a blue coating to a particular bulb will reduce its brightness, same with making the tint bluer. You cant apply this across a range of different bulbs though saying that the bluer the tint in the glass, the less intense the light will be.