Three lights? I have a "system" consisting of three lights, although my choices might seem odd to many CPF'rs at first glance.
Here goes:
- Coast Focusing Lenser #7438 with SSC P4 U-bin mod
- Coast Dual-color #7736
- Princeton Tec Impact II
A lot of you probably aren't very impressed. Read on.
First of all, they are all AAA format. Originally not a favorite cell format of mine, I've finally come around, by converting to Eneloop low-self-discharge NiMH.
Next, they are all direct-drive or resistor-regulated. This gives them a rugged, reliable simplicity that no driver circuit can match. And by running NiMH, with a relatively constant discharge curve, you get a reasonably consistent output.
Third, the two Coast lights use the exact same 3xAAA cell cartridge, and two cartridges provide me with 2.5 hours of reasonably consistent output from the incredibly bright (about 170 lumens out the front on fresh cells) and useful (decent range of focus with minimal beam artifacts) Coast Focusing Lenser.
Fourth, the Princeton Tec (4xAAA) makes a nice, waterproof spare cell carrier to either extend the range of the Focusing Lenser by another 1.25 hours, or to use directly, with it's single 5mm running for days continuously.
Fifth, the Dual Color 7736 is a nice, floody 5x5mm white plus 1x5mm red which makes a great indoor light and camping light.
This system provides for about 1 lumen, about 20 lumens, about 170 lumens of white, and a couple lumens of red. There are spot options (Princeton Tec and Focusing Lenser) and there are flood options (Dual Color and Focusing Lenser).
The direct-drive and AAA formats have additional benefits in SHTF situations:
AA alkalines disappear from the store shelves quickest, leaving behind... AAA of course.
Direct-drive lights running on alkalines have a very long, slow taper of diminishing output whereas many regulator circuits suck the cells down then suddenly leave you in the dark. For serious runtime, The Princeton Tec on alkalines will keep providing useful illumination for about 3 days continuously, or over a month at 2 hours per night.