Add-on Kit for Ecotech Radion XR15 \nThe Reef Brite XHO-K15 Add-on Kit will increase an aquarium's light intensity, PAR, and color. This kit is great for improving coverage and eliminating dead spots in a tank. The add-on kit can be controlled using the new Reef Brite Wireless Bluetooth LE controller (sold separately), which works with Apple® and Android™ devices.  \n \nProduct Highlights: \n\nXHO’s are dimmable\nCan be controlled with APEX® controllers (Reef Brite APEX LED interface required sold separately)\nEach kit includes two Reef Brite 10-inch Blue Actinic XHO’s, Reef Brite XHO-B30 brackets, a 2-way connector, and a power supply