Welcome to the CPF, i think that you will find a community full of knowlegable and caring individuals, and maybe a couple of strange ones =)
That being said: is brightness an issue? LED's are much more efficent, and for close quarters (inside a jail?) would probably provide you with better overal illunation, due to the color and overal beam spread.
i don't really know alot about long lasting reliable incandecants, (there aren't a lot of those to choose from) but i do consider myself to be somewhat knowlegable with led flashlights, with led flashlights, you won't need to change the batteries so often, so you really wouldn't need rechargables, and among those i must suggest:
Arc AAA - This is a must, small, bright, reliable, goto:
http://www.arcflashlight.com - no matter what else you get, this is required =)
lightwave 3000 - 3 c-cells, somewhat waterproof, long battery life, and attractive
Princton Tec Impact - 4 aa's, $30, durable, long lasting, submersable 500 feet
Arc LS - around $130 - 10? hour battery life, extremely bright, extremely durable, haIII, different batter choices,
made by arc
i can't think of any others right now, but these are some good choices.
if you are possibly willing to spend a little bit more,
http://www.surefire.com has some great tactical lights that are extremly durable, reliable, rechargeable, and good looking.