Surprising effect of an actinic light using two CR-60 with 400/420/450nm LEDs on a SPS-dominant display tank.
The left figure shows a SPS-dominant tank which locates in a famous multiple LFS in Tainan, Taiwan called "旭海水族". This 4.2 ft tank was orginally lit up with two old version Blaze series M-120S units. Due to the dominant white LED distribution in S model fixtures, the tank although looked bright enough to keep SPS corals, but the manager of the store want it to be bluish in color. After discussing with us, they decide to purchase two ComboRay series, CR-60 units, to combine to a 4 ft long fixture to serve as the actinic light source of this tank. They chose 2 x 400nm, 5 x 420nm, and 5 x 450nm LEDs and installed them with 90 degree optical lenses. Due to the use of 420nm LEDs, the light brought an elegant purplish hue into this tank. It was clearly observed that fluorescence reaction of most SPS species was significantly enhanced under the illuminating of this new light. The 90 degree lenses increased the light penetration without sacrificing too much light coverage making this 4 ft fixture a qualified actinic light source. The manager of the store was quite satisified with the effect as well as the product quality. Below are some photos of the light installation.