I've really developed a liking for the dual-switch design of tail clicky on/off with side switch for changing modes.

1 - AA: Four modes: moon>low>med>high, tailstand, lanyard, softly rounded edges at each end to make it pocket-friendly. Removable, crenelated head for use as candle. Square threads. NW high CRI flood beam, reversible pocket clip. Flat/matte finish (not glossy). I didn't include 14500 on purpose in order to simplify driver design (ala Zebralight) & keep costs down. As efficient as reasonably possible. Target price $25.00 - $30.00.