If you already have a night rig and are looking for some additional glow wire, go to IKEA!
I was in there yesterday and in the Christmas section, they are selling what they describe as "Glow Rope" (I think) for Tree decoration.
Basically, it's 10m of glow wire for around £13 GBP, complete with ac adapter and regulator, available in 4 or 5 colours. I'm sure if you already have a night setup, you could add this to it! The wire seems to be slightly thicker, and possibly more flexible than current stuff I have.
If you do get any, post your results here!