I keep a tritium vial clipped to the back of a Proton Pro next to the bed. Easy to find and grab in the night. $8 lasts 12 years.
TY for reminding me - you can put a large (1") keyring tritium vial on any light with a lanyard hole, only $20: http://www.cpfmarketplace.com/mp/showthread.php?t=182082
I keep a tritium vial clipped to the back of a Proton Pro next to the bed. Easy to find and grab in the night. $8 lasts 12 years.