a) which lightbox did you or your ex own?
b) can you expand about the sentence "just be sure that you have at LEAST a 5K kelvin and a CRI (color rendering index) over 90." I am realy a newbie to practical physics. are we talking about the light box or the bulbs? do you use the bulbs at home?
I can't remember which one exactly. It was just a top brand model with proper lighting (high CRI and Kelvin)
CRI = Color Rendering Index This is a scale from 1-100 on how close the spectrum is to natural sunlight (100 = sunlight). I don't know who started this rating system but it is recognized by the Illuminating Engineering Society.
Kelvin would relate to the color temperature (in degrees Kelvin) 5500 degrees Kelvin = light at noon. Lower temps look red and higher temps look blue. I would get something from 5500 to 6500 (I prefer the bluer look...just not too much).
With Flourescents, you can get a pretty awesome looking light. With incandescents, you are limited. I've found that most incandescent lighting which claim "full spectrum" are worthless. But I really enjoy the neodymium coated bulbs.
So in order of preference
Fourescent bulbs with temp rating of 5500 - 6500 and CRI above 90
Incandescent bulbs with neodymium coating.
Hope that helps. I'll see if I can dig up the box that my ex bought for you :cheers: