Tirrel-S LED recessed spotlight with trailing edge dimmable ballast The square Tirrel-S LED recessed spotlight made of Massive aluminium is supplied ready for connection including dimmable ballast (trailing edge - RC) and can be mounted in ceilings up to 1.5 cm thick without tools using installation springs. High luminous efficiency and optimum light distribution are ensured by the silver, highly specular reflector with rotationally symmetrical, narrow-wide beam light distribution and a transparent glass cover - general colour rendering index CRI > 80 - permissible ambient temperature (ta): -20 °C - +25 °C - protection class (EN 61140): II, IP code (DIN EN 60529): IP20 - with electronic ballast, phase cut-off dimmable - swivelling by 20° - without visible snap ring