Here is a very basic thread about solar lights that seemed to work. (But no specific recommendations.)

Dock Light for Bugs - Pond Boss

Here is another one about the underwater green lights.

Underwater Green Light - Pond Boss

I think the general consensus is that the surface lights work just fine and there is no "magic formula" for the bugs.

catscratch does have a video in the second link of his bluegill eating the bugs attracted by his dock light.