I like these 60,000 lumen LED flashlights from China
. I assume there's some exaggeration in their lumen count, but still, they produce some serious light.
60000LM 24x XML T6 LED Flashlight 5 Modes Torch 26650/18650 Camping Lamp Light | eBay
They're relatively inexpensive, and mostly waterproof (good enough to use on a rainy night, but not for diving).
You do have to deal with the 18650 batteries
, but you can easily find 12V or 110V charging
units for those.