actually, they may not be ok after all...
over the weekend, i took them down to 40 on the first test and they seemed fine - they gave reasonable illumination at depth, and they seemed ok back at the surface. after the dive to 60, they were still ok - no obvious problems - they were still shining when i got back to the surface. i assumed that there was no problem....
BUT...
... today when i was checking/cleaning my gear, i opened up the two maglites and they had water inside them!... :head and they didnt work - probably because of a damaged battery or short circuit. hopefully they'll be ok with new batteries once they've dried out.
i find it strange that they worked ok throughout the whole dive, when water obviously did get inside them.
... so, the small maglites are not suitable for deep freediving, but maybe ok for shallow depths?
next time i will try something new... i will strap a Q40 vertically around my elastic belt (around my stomach), so that it points upwards along the rope. should be quite effective and streamlined this way. i *think* this will work ok.... it's just that i don't like the bulky Q40 strapped to my head, especially when finning quite fast.