RGB Color Mixing - How much of each color to get white?

[Ken_McE]

I'm getting in a "UFO" RGB LED. Looking at the specs I see that it is rated to produce:

Red 6 lumens
Green 9 lumens
Blue 3 lumens

The blue is a lot weaker than the other colors. If I want to mix them to get a white light, would I use an equal amount of each color light? Is blue less neccesary to the eye?

[jtr1962]

The ratio depends so much on the particular frequencies of red, green, and blue light that it's difficult to say. This page on Don Klipstein's site is a good starting point. The ratio of RGB of the LED in question might actually produce a pretty decent white.