Features and specifications: 1) Wattage: 5, 7, 9, 11, 20, 30, 40W 2) Bulb type: T8, T9, T10, T12 PL 3) Wave length: 365nm 4) Produces ultraviolet rays that make white fabrics fluorescent 5) Suitable for medical and pharmaceutical industries, photochemical reaction, jewelry and historical relics verification, special stage effects and more