Super-efficient Sunleaves Satellite fluorescent fixtures are cool-operating alternatives to traditional HID systems. They can be positioned close to plants without scorching delicate new growth, and they’re self-contained units with the ability to hang both vertically and horizontally. Their low profile also maximizes gardeners' spacing options, and the 86% reflective insert maximizes available light. The Satellite Grow boasts two 4’ tubes that combine to produce 21,400 lumens at 6,500K. Hanging hardware is included, and replacement tubes are available separately. Satellite fixtures are protected by a three-year warranty, and the included tubes are protected for one year. Units measure 46.5" x 9.5" x 2.75".