The Kessil Tuna Blue A80 LED Light is the newest Kessil offering is half the intensity of the A160, but comes with all the same features and color and control knobs. This A80 (the Tuna Blue) version is for reef tanks. It's compatible with the Kessil Spectral Controller. Coverage is 14" to 24" depending on the scenario. For small nano reefs with a medium light demand the coverage is 14" (with the bottom of the light 4" above the water). Entry level reefs with low light demand will have a 20-24" coverage (6" above water). For large fish only tanks with low light demand coverage is up to 24" (6"-8" above water). For the Kessil A80 there is an optional Gooseneck with a shorter 'neck' to accommodate the smaller light and smaller tanks. Dimensions: Outer Diameter=4.88" Height=0.98". Power Supply: 100-240V AC (input) 24V DC (output). Power Consumption: 15W.