This Keystone KT-LED18T8-48P-840-D T8 Linear LED Lamp offers you a crisp 4000K CCT while outputting 1900 lumens. Rated 80 on the CRI (Color Range Index). This product also features a sleek finish, with an input voltage measuring in at 120-277V while using only 18 watts of power! certified while being usable up to and over 50000 hours!