The Hi-Tech Lamps Part number 50DLSW150A21-O is a 120 volt (120V), with a maximum of 150 watt (150W) Incandescent Lamp made by Osram. This lamp has a 3CONTACT Medium Aluminum base with a A21 bulb shape and a maximum average life time of 2400 hours. The color rendering indext (CRI) is 100 with a color temperature of 2850K and a maximum overall length of 134.9375mm. It has a maximum of 1790 initial lumens. It is also known as 50/150A21/DLSW/RP 120V.