I have lately been using some components of Solarforce flashlights to make me a couple of tactical lights (to use in a Remington 1100 shotgun and in a Kalashnikov rifle).
I bought a couple of loose bodies, heads, and modules, and for the remote cable switch I used a couple of Aimshot tail caps with pressure pads.
The modules are simple one function 200 lumen (or so) R-2’s, and have enough throw to make 50 yard shots possible. As the shotgun and rifle are intended for home defense, 50 yards are all I needed.
The bodies were intended for CR123 batteries and I loaded them with red Surefire batteries before mounting them on a Weaver 1” ring and clamping it to Picattiny’s rails in the long guns.

More recently I received a Solarforce L-2 five function flashlight. It also uses the R-2 module and sports a reverse clicky tail cap, which, when activated, goes to the last function (or level) that was stored in the memory.
The levels are full power (about 200 lumens), medium power (about 100 lumens) low power (about 40 lumens), strobe in the 200 lumen level, and SOS also in the 200 lumen level.
To activate each level, you just press softly on the tail cap.

The claims that I have seen advertised for the lumen output are much higher than the ones I am estimating here, but these estimates are based on my vast use of lights and in direct comparison with my Fenix TK-11 Q-5 flashlight that is billed as a 225 lumen light.

This wild throw of numbers of lumens is because the emitters are measured in Integrated Sphere Spectotometers without the reflector, head or lens, and are of course much higher than when the flashlight is used with these in place.
The true out-the-front numbers are much lower due to losses from the reflector and reflection from the lens.

The Solarforce model I have comes with the larger internal diameter body that will accept 18650 Lithium Ion rechargeable batteries, as well as the RC123’s and the rechargeable RCR123’s.
Having several 18650 batteries and a charger, I prefer to use the large Lithium Ion rechargeable battery.
Fortunately for those that will want to use the light on a rifle or shotgun, the Weaver 1” ring clamps to the 18650 body without a problem.

Prices of body components or entire lights vary depending where you purchase them. Your best bet is to Google the Solarforce name and see what is available and where at the time of your search.
I have been using the Solarforce L-2 for the last two weeks in my pocket and I don’t care for the sharp crenellated bezel that is very rough in my pocket’s liner. It was bothering me so much that I finally removed it in favor of a Z-32 Surefire bezel that I had in my spare parts box.

The strobe function is used in tactical lights with the hope it will bother the opponent more than the straight beam. To me it is of no value as a deterrent, but it is a good function to have if you ever are in need to attract attention and are unable to call for help.

I wanted to take some beam shots but the snow here has been so bothersome lately (we had 26 inches on the ground) and prevented me from doing so. In any case, the beam is so close to the beam shots I have made with other 200 lumen R-2’s that you can see them in the post titled “The 200 lumens battle,” and you can imagine the beams to be the same.
Black Bear