LUMii Socket ContactorOverview The LUMii Socket Contactor ensures perfect light timing for optimum plant development. The contactors include a Grasslin timer and they're designed and checked in the UK. The Grasslin timers are high performance and top quality units, which streamline operation in your grow room. General Information The LUMii Socket Contactors feature Grasslin timers; The contactors are available in 2, 4, 6, and 8 ways versions; Each unit has a protection