I find an LED Lenser P7 pretty good, small and portable and light so wont destroy itself or anything else when dropped from, oh I dont know, the top of a fin onto the stab for example.... I have been through about 10 head torches but number 11 has lasted the longest and its called a Gamma bought from a company called Alpkit, its very useful and still beats trying to balance a torch on a bleed duct when you are p!551ng about under a cowling in the dark.