Fluorescent lamps sold in the United States today are available in a wide variety of shapes and sizes ranging from miniature versions, rated at 4 watts, 6″ in length and 5/8″ diameter, to 215-watt types, 96″ long and 2″ in diameter. Commercially available fluorescent lamp types include T12, T8, and T4 compact and T5-linear and compact. Base types include bi-pin, single pin, several compact bases and recessed double contact.