Clare is annoyingly right as usual. She took one look at my LED Lenser which is a crackin little backup light with a great tight beam pattern and promptly told me you won't be able to turn it on or off underwater in gloves. She was absolutely right. They also unscrew to turn them on (ie: go too far and you flood it - unlikely but possible) I've got a snoopy loop round the head now to solve the grip problem and that mod works very nicely, but it's in the departure lounge
. As a recreational sport diving light - I reckon they're perfect. The LED Lenser chip is 1.5w which is incredibly bright - the Heser b/up lights are 3w apparently which must be not far off a Salvo! LED is def. the way forward on backup lights, the battery life, colour temp and brightness is in a different league to conventional bulbs.
I shall be meeting up with the Eva Braun of the Dive Nazi's again in the new year so that she can laugh at some more of my equipment