Energy-efficient Cree leds spectrum (Cree Royal Blue,Cree blue ,Cree white,and violet) can promote optimal coral growth and enhance dramatic coloration, while creating a gentle shimmer throughout the aquarium 90 Degree 3 in one 97% transmittance secondary optical lens, With a ...Energy-efficient Cree leds spectrum (Cree Royal Blue,Cree blue ,Cree white,and violet) can promote optimal coral growth and enhance dramatic coloration, while creating a gentle shimmer throughout the aquarium 90 Degree 3 in one 97% transmittance secondary optical lens, With a maximum spread of 24′′ x 18′′, the light has a high PAR at a depth of 24 inches, perfect for small to medium reef tanks Two dimmable LED channels with touch control -- White and anothers(royal blue,blue and violet),two channels can be operated together or independently,the intensity can be adjusted from 0% to 100%, easy to dim appropriate lighting for different corals and fish, promote the growth of any SPS and LPS flourished under light Smart fan for light temperature control ensuring optimal lamp working conditions.Two-rollers silent fans, noise standards lower than 43 db(A), fast heat transfer and create you a comfortable home environment Easily mount your light on your rimmed or rimless tank with the tank frame,tank glass or frame should be thinner than 20mm(0.8inch).the nylon screws gives your tank glass safeguard. This Aqua Knight V2 II LED Aquarium Light Design for Nano, Professional Cree led layout,display corals' color well and grow coral fish well.