Dymax REX-4 6ft 39Wx8lighting is made with 8 x 39W T5 tubes to provide optimum lighting effect with full light spectrum for the aquarium. The lamp is designed to achieve a slim and aerodynamic look with the lowest heat radiation and energy consumption. The shape of the reflector is designed to maximise capability to penetrate the water. With all the unique design and considerations, the Dymax REX lighting provides world class aquarium lighting for the aquarium.