I like the LED torches now available, particularly the small, keychain types eg the Photon II microlight. All mine have momentary & lockable ON. I have one with a red LED for general cockpit use and another few with white for ground & inflight ice inspections or when I want a bit more white light inside. If I want a fair bit more light I now have an 'AA' sized barrel type that has 12 white LEDs.
Beats the hell out of bulb type torches and have replaced my maglights.