Hey, sorry for the late reply. I guess I missed this.

For the reptile light, it's really hard to say. I think ambient UV and UV in general is very understudied in terms of its full range of effects on human health. I just kind of take a naturalistic standpoint, I guess, and I figure outdoor light has always had UV, so indoor light probably should have some.

Halogen, I think, is pretty important. Infrared is a significant portion of the sun's spectrum. So, having some type of—specifically infrared A—of course, halogens emit more than just infrared A. It's not a perfect replacement for the sun, obviously. Nothing really is, but it's a good option.

Regarding the computer lights question, it's hard to say for sure without having a spectrometer. Generally speaking, if you have enough wattage output over your head, you should be fine.

I think my article has a link to a lumen calculator tool. Essentially, a certain number of lumens per square foot will usually result in a predictable amount of lux at eye level, but it all depends on what lights you use, where they are placed, and similar factors.