I have had both, still have bug lights working, disappointed in underwater lights with fertilizer and/or anything less than clear water; don't use underwater anymore.
Ya'll won't believe this and I would not have until I tried it. I took 30 feet of black plastic pipe and made a 10' diameter boomerang out of it. Tied this to the dock under the bug light. 3 hours later you could not put a pencil eraser in the circle without touching what I think was mosquitoes. The next morning they were gone. I then took white sheets an the bank and did the same thing. The bugs were still on the sheet the next morning. I think this proves the fish ate the bugs. Density of the bugs vary every night, but not sure enough credit is being given to bug lights
