MOONLIGHT MODE
A hyper-efficient low-light mode. At just 0.2 lumens, it provides just enough close light without compromising night vision. Perfect for map reading in darkness. This feature allows a light to run continuously for weeks on just one set of batteries.

STROBE MODE
High-output strobe mode is both disorienting at close range and attention-getting at long range. Effective for both personal defense and emergency signaling.

SOS MODE
A Morse code–style flashing that spells out S-O-S for signaling distress.

BEACON MODE
A signal mode that is highly visible and will run for a very long time. It ramps the brightness up and down once every 10 seconds, creating a bright visual signal that conserves battery life.

PRIMARY MODE
Used in the Quark Tactical series, this fully programmable mode is activated when the head of the light is fully tightened.

SECONDARY MODE
Used in the Quark Tactical series, this fully programmable mode is activated when the head of the light is loosened a quarter turn.