The LightRail® 4.0 AdjustaDrive now with fully adjustable variable speed control between 6 and 10 RPM and 0 to 60 second adjustable time delay for promoting even plant growth at the ends of the lamps travel. The all new LightRail® 4.0 AdjustaDrive from Gualala Robotics is sure to give any gardener the ultimate control. Rail and motor kit in one box. Box dimensions 41 in x 6 in x 5 in. Excellent for shipping or conserving space.