The Gavita Slim Line 2 (SL2) fixture features the W150 Reflector, which has a wide spread for optimal uniformity (150? beam angle). This reflector is best suited to overlapping plans. The SL2 features highly ecient passive ballast cooling that helps contribute to long fixture life. Other features include sealed housing with a Gore-Tex? ventilation plug, and controllable output up to 1150 W. The SL2 is also equipped with a Repeater Bus interface. This double-port connection enables control of the SL2 with a Gavita EL Controller (sold separately). Connect up to 100 fixtures in a single daisy chain series, up to five daisy chains per EL controller output. A single EL controller output can control up to five 100-fixture daisy chains, giving you room to grow.