Much better yields when our grow lights move because more leaf area is reached with better light, so no hot spots and no shadow patterns. Plus we cover about 30 percent more area, and that’s per grow light. Travels approx. 4 feet per minute. 0 to 60 second adjustable time delay. Handles reflectors up to 50 pounds. Light Rail 3.5 works with 110 volt only and does not work with 220 volt electrical.