The previous discussion about this subject is linked. Here is a link that might be useful: Lighting for Succs

Are compact fluorescents available in your area? Sometimes those can work if you find the highest wattage the lamp can handle in a bright white (daylight--more of the blue spectrum). Depending on how many bulbs your lamp has, and how close you put them to the bulbs, you could do a pretty decent setup with compact fluorescents. I don't know that you'll get tons of growth, but it is a good supplement when days are short. The LED lights seem trickier, and just from what I've read are more expensive up front. But I'm no expert. This article explains it pretty well without getting too technical. http://homeguides.sfgate.com/grow-plants-cfl-lights-43203.html

Yes, that could be, it definitely will be lighter where it was covered by soil. They will slowly darken with more since exposed to light. (I asked you to check for possible softness just to make sure there is no rot). If you can put it into more light, branches should grow little 'chubbier'. Many of us use supplemental lights for succulents during winter. Here is my A. subulata - under lights:Good light, well-draining soil and container with drainage holes is all they need to grow well :) . I see you have cache pot (outside container) - whenever watering, check it maybe 15-30 min after and empty if there is any water.

I use those same bulbs with a 13 in clamp light (similar to the one above) with a dual socket adapter in it. I think it helps significantly, but I probably need to get another to cover more area. I keep my black Prince and others prone to etiolation under it, probably about 4 inches from the bulbs. I do rotate other plants under it too. With that said, on sunny days this room also stays pretty bright (photo taken on a cloudy day)also somewhere around here I posted a picture of my black Prince prior to getting it into good light and an after. Went from light green to dark purple. Took several weeks and then it was like it changed over night.