SLI manufactures a wide variety of 1" diameter energy-efficient, long-life fluorescent products.Features * A variety of lengths from 18" to 8' * The popular 4' and 8' general lighting products are available in high-color rendering 700 and 800 series designs * Color temperatures from 3,000 Kelvin (warm) to 5,765 Kelvin (cool) * All 4' products are Terra-Lux, which denotes a TCLP compliant product. These lamps can be disposed as non hazardous waste in most states