This Ushio FHE / ESB bulb is a 20 watt 6 volt HLX lamp. It has a base of G4 2-Pin, a shape of T3.5 and a rated life of 100 hours. It has a maximum overall length of 1.209 inches, a lumens of 480, and a clear lamp finish. This bulb can be used for the following applications, Commercial Theater, Museum, landscape lighting, Living Room and more. This Ushio ESB / FHE bulb has a diameter of 0.351 inches and a color rendering index of 100.