- most importantly, light ample for most individuals to carry about downed trees. I don’t feel that’s an option for most, even with the lightest gasoline engined dirt bikes.My PVS14 is definitely an L3 thin movie by using a photocathode sensitivity of 2500uA/lm, I've seen lots of unfilmed tubes hover around 2000uA/lm. I don't suspect that my sl