For sale is a nitefighter sst-40 light. It's about the size of a C8, single 18650 light. It's got a 20mm BLF driver with low resistance FET. It's four modes from moonlight to turbo with good spacing in-between. This light has nice anodizing and an integrated shelf for good heat transfer. The emitter is on a noctigon, the driver is one of them with the hole in the middle for the spring bi-pass. It has a large very defined hot spot with good flood. It's set up for use with an unprotected battery, high amp battery is best to get the most lumens possible.
$25 with free shipping in the Continental US of A.