The Reef Brite X360 XHO® add-on kit improves spread and intensity (PAR) while promoting growth and color in corals. No special hardware or tools required to install. Mounts between your Kessil® 360 arm and mount (Sold separately). Not recommended for flex arm mounts. With a combined total of 16-3-Watt LED’s in the Blue and Violet regions, the X360 add on kit will increase intensity, PAR, color and pop. Great for improving coverage and eliminating dead spots in your tank. Each kit includes two Reef Brite 11.125-inch Blue Actinic XHO’s, one X Series bracket, X Series endplates, 2-way connector, inline dimmer, and power supply. The included XHO’s are dimmable and can be controlled with APEX® controllers (Reef Brite APEX LED interface required sold separately). They can also be controlled using the new Reef Brite Wireless Bluetooth LE controller (Sold separately) which works with Apple® and Android™ devices. Not recommended for use with Gooseneck / Flex Arm Mounts