[sjamesNorway]

What I believe is important here, is Photosynthetically Active Radiation or PAR. If you look at the attached "PAR influences" chart, you'll see that light in the range of 400 to 520 nanometers is "most significant in promoting vegetative growth". (Nanometers are a measure of the wavelength of color.) Vegetative growth is what is needed for seedlings. Looking at the PAR spectrum, you'll see that this range correlates closely to a color temperature of 6500K (Kelvin).

I use 58 Watt 6500K T8 fluorescent lights for my seedlings, and they do very well. 6500K fluorescent lights are commonly referred to as "daylight".

Light in the "warmer" (lower) Kelvin range promoting flowering and germination isn't needed until later, and is provided by the sun.

Remember that it's important to have the lights as close to the seedlings as possible without overheating them. About 2" is what I use.