Glad I could help. That script, with a little tweaking, is the basis of many fake GI scripts where you create a hemisphere and place a light at every vertex. Fun stuff. About the Spacing Tool, I just never really got the hand of it. It's very possible I'm not using it right, but it always seems kind of cumbersome to use…
I couldn't make it work either. Seems that the bend modifier doesn't affect the transform matrix of the objects directly. So I wrote a quick script that will place an instanced light at every point in a spline. Don't know if that's really what you're looking for, but it might come in handy. Create a spline with two points,…