The Westinghouse Blue Tip Projection Lamp Bulb is a 500w CZX 120V bulb designed for use in slide and movie projectors. With a universal compatibility and reliable Westinghouse brand, this lamp bulb is an essential component for achieving clear and bright projections. Featuring a power range of 400-500W and a voltage of 120V, this lamp bulb is ideal for professionals and hobbyists in the film photography industry looking to enhance their projection setups.