Just received my LL - F1, trying it out as my Tech light for daily work,
I'm using rechargeable Tenergy RCR123A LiPo 3V batteries, these are new batteries and so far I'm impressed with the run time daily usage as a Tech light at work,
The battery is still on its first charge and is showing 3.24V and 100% on my ZTS tester after a week of playing around.
The Low setting I find very useful, it's more than bright enough to do the Job, and can leave some juice in the tank.
Also I noticed the light seems neutral white.
Another nice feature is the clip can be slotted in two places, and fits perfectly on a peak cap.
I do miss the wide angle zoom of my LL P5R which is currently my daily Tech light (also useful as it has the USB charger).
The LL wide zoom is really useful when you need an even spread of light, the hotspot I find a bit glaring.
Price wise the F1 was a little expensive $68, but compared to say the Nitecore EC1 at $86 maybe not, these are local prices, and I would have had to pay shipping on the EC1.
Might post some more info in a few weeks time.