The main idea of fitting the searchlight and the flashing beacons was to enable me to see where the sub was once below periscope depth....our local lake can get a bit murky at times, so the easier it is to see the boat, the better I like it.
If it helps illuminate the area directly where the video camera is aimed at, then that'll be a bonus.
Brooks...yes, already working on that idea. A toilet roll inner tube to start with to get the shape correct, then make one from plastic tube to that shape. As Andy says, it may not be necessary, but we'll see how we go with it.