The two photos show the feasiblity of using CR-30 units as the main light sources for nano aquariums. The left photo is a 45cm standard saltwater tank with a CR-30 on it. The LEDs inside are 3 x 450nm and 3 x Cool white. Although the light fixture is 30cm long, it provides not only sufficient light coverage but light penetration to this nano tank composed of mainly LPS corals. The right figure is another 40cm standard freshwater tank with a CR-30 unit. With 3 x cool white LEDs and 3 x neutral white LEDs, the tank was lit up brightly demonstrating the warm color that a beautiful freshwater tank should be. These two photos are powerful evidence that ComboRay series products are not only suitable serving as supplementary light for big tanks, but they are also qualified serving as main light source for small to medium sized aquariums.