Flashlights with around 150 and above runtime?

i wanted to find out what kind of lights have a good beam and have a runtime of 150 hours or more. i know eternalights have great runtime and the streamlight propoly 4AA LED. any others?

The PT Attitude has 150 hours advertised. I once tested this. Being direct drive (with resistor), the LED's dim gradually over the entire life of the batteries, so after 150 hours they are significantly dimmer. However, at 150 hours they are still useable. When the light was still useable at 150 hours (about a week), I kept the test going. Three weeks later (that's right, 600 hours), the light was still on, but just enough to navigate around a completely dark room. At this point I just turned it off.

In short, the PT Attitude will go for 150 hours useable and then a month more if you don't mind it being really dim.

Gatlight (Variable dimming)
HDS EDC
JSB Indium Smart (If you drove the LED at a very low current)

Just any variable light that drives the LED at a low enough level works