The Connectable Strip Lights allows you to create your own lighting system. It's simple. *There are 4 different sizes: 10, 20, 30, and 40 inches. *You can connect any combination of sizes together creating your own system. *There are 3 different units: 1) The starting unit, this has a plug-in power cord on one end and a female cord on the other end. 2) The middle unit: It has a male plug and cord on one, and a female plug and cord on the other end. 3) The end unit: Has just has a male plug on one end and an end cap on the other end. *You must use a starter unit to get your system going and an end unit to end the system. You can put up to 200 watts together. *Last 40,000 hours *Made in USA *U.L. Recognized and Rohs compliant *Available in 5 finishes: Black, Brass, Chrome, White, and Clear.