The Single T5 Fluorescent Fixture is an excellent option for supplemental lighting. Flexible fixture includes a "daisy-chain" cable to link multiple units and allow for a myriad of possible configurations. 54-watt fluorescent tube emits 6,500K and efficiently provides the spectrum of light plants need. Each 4' x 7/8" Single T5 Fixture includes a six-foot power cord, ?daisy-chain? cable, built-in electronic ballast, 30,000-hour rated tube, and mounting hardware for horizontal or vertical positioning.