The EcoTech Marine Multi-Light Radion Mounting System (RMS) Track is a highly modular, architectural horizontal rail designed to securely hold and precisely position multiple EcoTech Marine Radion XR15 and XR30 LED fixtures over your aquarium. Key Features Built-in Cable Management: Features clean integrated routing channels to completely hide messy power cords inside the tracks. Universal Tank Compatibility: Fits seamlessly onto rimmed, rimless, and euro-braced aquariums. Premium Construction: Crafted from heavy-duty, lightweight anodized aluminum for ultimate corrosion resistance. Optimal Height Positioning: Places your Radion fixtures exactly 7 inches (18 cm) above the glass for perfect light spread. Track Sizing Guide The track serves as the horizontal span between your mounting endpoints. You should select a length matching your aquarium's span: 20.5" Track: Fits tanks 18.5” to 28.5” wide 30.5" Track: Fits tanks 28.5” to 38.5” wide 40.5" Track: Fits tanks 38.5” to 48.5” wide 50.5" Track: Fits tanks 48.5” to 58.5” wide 60.5" Track: Fits tanks 58.5” to 68.5” wide 70.5" Track: Fits tanks 68.5” to 78.5” wide 80.5" Track: Fits tanks 78.5” to 88.5” wide 90.5" Track: Fits tanks 88.5” to 98.5” wide Required Components for a Full Setup Because the Multi-Light RMS is a customizable, modular configuration, buying just the track will not allow you to mount your lights. A complete system requires three separate parts: The Track (Part A): The horizontal rail spanning your tank length. The End Support (Part B): Choose either a Multi-Light RMS Arm Kit to clamp onto the aquarium glass or an RMS Hanging Kit to suspend the entire track from your ceiling. The Slides / Brackets (Part C): Dedicated sliding X-brackets specific to your light generation (e.g., XR15 or XR30) that slide onto the track, letting you adjust and rotate light positioning freely.