Light both sides of your trailer where the cutouts on your step are located. One 20-inch / 30 LED light added under each step adds visibility while towing and will light your entire cut-out properly. - SKU 113 Trailer Cutout Step LED Lighting Kit Includes 2 - 30 LED / 20-inch Blue Water LED™ Light Strips with 3M™ Industrial Waterproof Adhesive Backing T-tap Splices Male Connectors Product Warranty Lifetime Limited Warranty