paddy are you looking for tips on night spearfishing or regular night diving? for regular night diving on scuba, its all about the location, must be shallow, no curents and like my man covert said, no sharkies, they tend to be a bit more active at night...
if you are talking about night spearfishing, i really dont have much experience, i tried it once, it was a lot of hassle, loading the gun while having a torch in hand, the good thing is, you end up looking like one of those SWAT team guys you see on tv..
best of luck mate
