I just like long battery life and still have lots of output
That's a tricky question. Are you looking for:
- Longest regulated output at a certain lumen level
- (if so, what lumen level)
- Highest stable output (so, for example, excluding turbo modes)
The highest lumens per watt will likely come at a very low output level, from something with a buck driver. The highest lumens per watt at a specific light level is a lot trickier, and a function of both emitter efficiency and driver efficiency.
As a random guess, I'd say maybe a Zebralight?
Im not very good at explaining my self .id like a light around 100 lumens but i want it to have the longest runtime at 100 lumens