Thanks all. For those who commented on soil, yes it is normal potting mix and holds more water than it should. I have not had time to get cactus mix and repot the plant but have been monitoring the water level and do not think this is a problem. The "roots" Woofie mentioned are actually the remains of dropped leaves. As the plant has grown longer, it has dropped leaves toward the base. No other plants in the pot.
In doing a bit more reading, it looks a bit like ghost plant, which appears to be able to trail.
If it is a light problem, is there an artificial (UV?) light I could buy to help? As I said, I have several succulents growing in the same area (same soil) with no problems at all.
