Providing a large coverage area at an economical price, the LuxStar T5 4' x 4 Bulb Fixture will give your plants the perfect spectrum no matter what stage its in! These fixtures also emit significantly less heat than other reflectors so they can be placed closer to the tops of plants, giving them that much more light! The LuxStar T5s use high-efficiency digital ballasts and high-output bulbs to create the most efficient light source. They also feature dual power switches so you have the option of dimming the fixture by 50%. The LuxStar2 is extremely versatile and can be hung in 3 different ways: overhead, vertical, or horizontal.