Bayco SL-223 Replacement Fluorescent Bulb for Models 623 and 823 Durability and safety tested for the toughest situations Designed in the USA with quality materials Used in tactical, outdoor, Recreation levels Replacement Bulb for Fluorescent Work Light Models: 623 and 823 Easy to Install Cool Running, 15-Watt Bulb Provides 7,000 Hours of Use Ideal for Industrial Personnel and Contractors Barco is the Established Leader in Next Generation Task Lighting System