Reply to thread

Without seeing the actual image, it's difficult to know exactly what's going on here, Lee, but here's my guess.

Lightning is skinny. Even selected it's difficult to get the curser exactly on the thing.  (Here's where the small curser comes in handy.)

I assume you've checked your new layer with the background off to make sure it has only the lightning on it? That sort of selection can be tricky; sometimes you may have selected more than you thought.