This 2-pack replacement for GE 1665 (MPC GE #27532) provides reliable illumination for aircraft and airfield lighting applications. Each 22.4-watt, 28-volt bulb features an S-shape glass design with a BA15S single-contact bayonet base for secure installation. Delivering 21 MSCP of bright, consistent light, these low-voltage bulbs ensure dependable visibility and performance in demanding environments. With a durable 1000-hour lifespan and compact 2" length, they offer long-lasting reliability ideal for aviation, signaling, and specialty lighting systems.