The PAR38 lamp is a parabolic reflector with a 120mm diameter. The design allows for light to be focused in a narrow beam, making them ideal for outdoor spot lighting, track lighting and various areas around the home. The beam angle is often specified by the manufacturer – choose a tighter beam for instances where high intensity is required for a smaller area. Also, fixtures mounted relatively high may benefit from a narrow beam. A wider beam may benefit those requiring more of a floodlight effect, such as outdoor security lighting.