I would think stronger light would only help. I'm not 100% sure what's going on, but under low light conditions stems tend to stretch out and reach for more light, and with some succulents there is a companion effect where the leaves get smaller and smaller as the stem gets longer and longer. I don't really know what your plant is, or if it's really many plants in one pot, maybe someone else will chime in on that subject. But I do see some leaves lower down on the stems that look different from the more recent ones, and that would seem to suggest that maybe at some point in the past the plant was getting more light, and then conditions changed. If it's an indoor plant, it should "see" the sun for hours a day year round, with no curtain or blinds in the way.
The difference between indoor and outdoor sun (other than geometry, as a window is fundamentally limited in how much sun it can receive) has to do with the way regular window glass filters out much of the harmful UV portion of the spectrum. That's not something our eyes see, but it's there in outdoor sun and greatly diminished indoors. Succulents can build up resistance to these rays (after all, they grow outside in the sun in nature) but it takes some time for that to happen. By all means leave your plant outside if you're in SoCal, unless it's painfully hot, just go in tiny baby steps as you dial up the light. But indoors there is basically no way you can provide too much sun, it's impossible unless the plant is coming out of really deep shade.