Beacon with many hours burn time?

Hello, do you know a light with many hours burn time?
I will use that for sailing rivers by boat at night and I need a bright, powerful light. It has not to waste too many batteries.
I am inexperienced, are tere any big leds torches?
Can you give me some advice please?
thanks

When you say "beacon" you are referring to a stationary light that flashes, right? If so, check out flashlightreviews.com. Quickbeam has an entire section on emergency beacons. BatteryStation.com sales beacons (you can buy there after you read what Quickbeam has to say).

I am not sure if LED beacons are powerful enough, though. You may want to look into the strobing incan beacons for safety applications.

If you're looking for a powerful "spotlight" for boating, that's a differente ballgame. Do a search in the spotlights forum for more info.

I'm sorry my bad english.
For "beacon" I mean a normal ligth, a big torch very bright.

Adriano:

If you're traveling on US waters, there are federal requirements that you must comply with regarding lighting your watercraft (depending on what kind of craft you have).

Your trip sounds like fun.

African rivers.