The Q20 Q-Lion Switch Lithium-Ion Linear LED Lamp from Quasar Science is a portable, 24", battery-operated, bi-color tube light useful for creating fill and accents in both still imaging and video-based applications. Compact and lightweight, the Q20 may be mounted via the 3/8"-16 socket or simply stuck in place on metal surfaces with its magnetic base. This Version 3 LED light features single-button operation and the button is recessed to prevent accidental setting changes.