I use a Petzl headtorch with a home made red filter (from a clear
35mm film canister coloured with felt tip) it works well and a friend adopted the idea after I suggested it. You don't need two
hands to operate it and you always know where it is (on your head).
I also carry a mini maglite (with red filter) on a lanyard around my neck.
For inspections, the bigger the torch the better.
Squawking 7700