Integrated Connection System (ICS) The Meridian ICS makes it easy to seamlessly connect multiple Meridians into one cohesive lighting fixture. These rails slide into the T-tracks on the front and back of your Meridians and are securely fastened with set screws, creating a single, stable assembly. Perfect for larger reef tanks, the ICS allows you to link multiple Meridian 11s for extended coverage: 2 Meridian 11s to cover a 4-foot reef tank 3 Meridian 11s for a 6-foot reef tank 4 Meridian 11s for an 8-foot reef tank...and so on, giving you near-limitless customization options. The ICS rails are available in 2 sizes: ICS20: 19.5 inches (50cm) long, ideal for connecting multiple Meridian 11s for even light distribution over 4-foot, 6-foot, or 8-foot setups. ICS10: 9.85 inches (25cm) long, ideal for connecting multiple Meridians in closer proximity, leaving more space for additional accessories like Edge Bars.