This 150W lamp fits inside the standard Sciencetech FB-QTH-3 QTH Fiber Illuminator. It has a 2-pin G5,3 socket, and built in 50mm dichroic MR-16 reflector. it produces 900 Lux and has a service life of 200 hours. Please note that a higher illuminance version but with shorter service life with the same socket, working distance, and voltage requirement is also available.