This is a single LED bulb designed for 24VAC/DC applications. It features a red color and uses a BA9S base. Sold individually, this bulb offers a bright and efficient lighting solution.The IT-RL0-CL4-24 is a single LED bulb with a BA9S base. It operates on 24VAC/DC power and emits a red light. The bulb is sold in units of 1.