Reef Brite Interface for Controller – Dual Channel – APEX™ Certified versatile dimming control for Lumi Lite, Tech and XHO™ lighting units. Works with any APEX™ controller or can be controlled by 0-10 volt based controllers. Easy to install and set up. Simply plug the interface inline between any Reef Brite™ LED unit and power supply, then plug the RJ45 cable into any available VR port on your APEX™ system. A VDM module is not required so long as you have a VR port available on the main APEX™ unit. Recommended maximum load for single or dual channel models is 120 watts per channel.