Looks like an Echeveria shaviana, or???

It does look like it has been suffering from lack of light.. I would definitely do all I could to get it that light, even if I had to buy a new one.

Yes all my other plants are happy because they're shorter and can be under the light better. I've tried propagating and I have a couple leaves that take root but no leaves grow. Does it just take longer or can this only work with beheading?

I would assume that leaves will grow after a while, but who knows! Sometimes, leaves just refuse to grow. The cutting pictured looks pretty young, so I bet leaves will grow in time.

Thanks! And I want to behead the mother plant.. but what's the best time to do that? I don't want it all stretched out when I behead it!

I think the best time is definitely in Spring, where the plant will root quickly because of warm temperatures, and new growth will develop easily instead of being sluggish.

You will also want to wait for the plant to develop a nice compact head (you will only be able to do this under lights at this time of year), so that the plant will look better when it is rooted and growing again.