LiteFlux Co. Ltd. is based in Taiwan (web site). They sell flashlights with an amazingly complex programmable user interface involving clicks and press-hold sequences. Two general user interfaces can be selected: compact user interface or full user interface. The number of modes can be set from 1 to 5 with any brightness level, strobe, SOS, or beacon modes available. Optional battery protection (low voltage for li-ion batteries) and last mode memory.
LF2XT - 1xAAA or 10440 li-ion programmable with Cree XP-E Q4 neutral white emitter available in black or natural
LF3XT - 1xCR123A or 16340 li-ion programmable with Cree XR-E Q5 emitter available in black only
LF5XT - 1xAA or 14500 li-ion programmable with Cree XR-E R2 emitter (also has been made with Q5) available in black or natural
LF1 - 1xAA (or 2xAA with extension tube) 2 mode light with a T-binned Luxeon 3 watt LED emitter.