I recently found some LED Light-bulb conversions for MagLite flashlights that others might be interested in. The LED replacement "bulbs" are made by TerraLUX (an affiliate of MagLite) and are available in various sizes to fit the various MagLite flashlights.
Aboard our boat we have MagLites sized for two D-Cell batteries in mounts at the helm
, at the companionway
and in each compartment so that no matter where one is aboard, one can always reach-out and grab a light if/when necessary. As a matter of routine we put fresh batteries in each of these at the start of each sailing season and then, during the season, as necessary. (We use a little red "tail light tape" to cover the lenses to ensure that night vision is less effected although that can easily be stripped off if necessary.) I did our annual battery replacements
yesterday AM and, on two of the units, replaced the incandescent bulbs with TerraLUX's TLE-6EXB 140 lumen LED's. The difference in brightness between the LED and incandescent bulbs is quite remarkable and TerraLUX guarantees 17 hours of "run-time" on a typical set of batteries. (I will shortly be replacing the rest of the incandescent bulbs.)
While some might not care for MagLites aboard ship, I have found them to be very robust. Ours are fitted with flotation collars cobbled up from beer
bottle cozies and lanyards attached with wraps of Rescue
Tape, both fitted to each light after I accidentally dropped one over the side some years ago. Interestingly, the diver that does our bottom cleaning
found the lost
light several months later and, after a good cleaning
to remove muck, some barnacles
etc. and some new batteries, the AWOL light worked perfectly, evidently none the worse for wear (or where).