My best flashlite is with my fire gear; Big Ed style. Also $$$$$
Otherwise, the best lights I have, are my 9V Makita and 18V DeWalt. The Makita is 15 years old, the DeWalt 11 or so. I have gotten sooooooo much use out of those. They have lasted a long time. They use common rechargable battery packs, of which I have multiple. For the DeWalt, I also have the charger that works in the car. They have been used around my house and property, on camping trips, dropped in the mud ect ect.
I would highly recomend something like that. They put out a lot of light. The batteries recharge, and last a long time on a charge.
We also have a few Mini-Mag lights, with LED conversion. And a couple LED headlights. Somehow, I can never seem to find one when I need it. But I can always find that big yellow DeWalt. Have a 2-D Maglite too. It always seems to be hidden in the back of a cabinet...
I also have a 6-D Maglite for the last 25 years. Aint used it in years. Right now, it would cost $15+ to fill with decent D cells... Great light, but too expensive.
Otherwise, there are some excellent lights for law enforcement and fire fireghters. They throw a lot of light, are rechargable in most cases, and are built TOUGH. But, $$$. Galls, Firestore.com ect have them. Again, $$$, it it hurts when you lose them...
That DeWalt of mine, makes it a lot easier to set up camp in the dark. Our Scout troop usually gets set up in the daylight, but during the winter, when we leave for campouts after the end of the school day, sometimes we get there at dark. That DeWalt has worked great when setting up tents and stuff. It blows away most other lights for that kinda stuff...