Re: UK 2L lowest priced way to get regulated light
The incan is a heck of a lot brighter than the led version, from what I can gather. I have a 4aa eLED on order with the idea of putting the head onto my 2L. But I'm starting to feel that I don't really need the Luxeon head. I carry the 2L as a brighter backup for a 5mm led light, so maybe the underdriven Luxeon isn't enough of a boost.
Badbeams, you could look at an Inova X5. Unregulated, but will run almost forever on near-dead 123's.
On the other hand, most any light (Arc4, Surefire, or whatever) will get good use from a 123 til it's say 85% depleted. That means at $1.25, there's about 18 cents worth of juice left when you change the cell. So to pay for a $40 light with spent-cell savings you need to put over 200 of those near-dead cells through it. If you're using that many cells, maybe you really should change your main light to a rechargeable.