G13 fluorescent bulb with shatter protection philips bulb fluorescent bulbs with 26mm diameter properties transparent protective casing around the entire bulb protective casing up to the end of the cap can be replaced with all normal 26mm fluorescent bulbs surrounding compliant with rohs and weee requirements advantages no escaping of pieces if the bulb is damaged uv reduction by 95 good colour reproduction level 1b ragt80 nearl