| Hello Stuart and all,
I just had a similar experience last week with my Meg (Apeks) HUD failing temporarily on a cave dive to 80m. It went off and stayed off for about 15-20 minutes and than it turned back on during deco.
I used HID 10W Czech made DTD light (by the way very excellent light).
I dive the same light all the time and it happened only the one time so far.
I was away from email since so I didn't have a chance to contact Leon or Mark Meadows and ask what they think about it.
But a friend of mine and long time very experienced CIS Lunar diver confirmed similar experience with the CIS handsets enterfering with powerfull video lights (400W)...
Hope we figure this out soon.
Jitka |