My son, Montanaboy, uses lights quite often. We have fished with him, using the lights, on docks on three different lakes. We killed them every time, when others were only catching a few. Two of the docks had brush, and one didn't.
Last year, a guy on the dock at Arcadia was doing pretty well with a light.
This past year at Ft. Cobb, some guys did very well most of the time, but not so well on other nights.
Most of the guys I have seen at Carl Blackwell didn't do very well when using the lights.
Amen on the bluegills being great eating.