A BR30 light bulb, also known as a reflector bulb, is a type of directional light bulb commonly used in the lighting industry. It is characterized by its wide-beam angle floodlight design and has a diameter of 30/8 or 3.75 inches (9.53 cm). The “BR” in BR30 stands for “bulged reflector,” which refers to the slight bulge near the base of the bulb. This bulge serves to direct additional light out of recessed fixtures, making BR30 bulbs ideal for applications where focused and directional lighting is desired.