Hand held lights are controlable and enough IMO. I carry three because the 2 backup lights are always on my harness but I think 2 is enough for a recreational night dive.
I absolutely hate when divers wear strobes and woun't dive anywhere near them. I can't think of a nuch more irritating thing on the face of the planet...I mean I really hate em. Non-flashing tank lights are almost as irritating. Glow sticks and things like that are less irritating but still irritating and, IMO, not needed. You need to be able to see one light per diver. Good buddy skills and light handling will work just fine. Caves are pretty dark and I have yet to see a diver wandering around with any of that junk hanging off them and flashing/glowing in peoples faces.
Strobes or other lights to mark entry/exit points make sense some times of course.
I absolutely hate when divers wear strobes and woun't dive anywhere near them. I can't think of a nuch more irritating thing on the face of the planet...I mean I really hate em. Non-flashing tank lights are almost as irritating. Glow sticks and things like that are less irritating but still irritating and, IMO, not needed. You need to be able to see one light per diver. Good buddy skills and light handling will work just fine. Caves are pretty dark and I have yet to see a diver wandering around with any of that junk hanging off them and flashing/glowing in peoples faces.
Strobes or other lights to mark entry/exit points make sense some times of course.