12 City-Hydro Microgreen Grow Lights with a City-Hydro Powerbox, Our lights are manufactured by a leading LED manufacture, they are 875mm or 34.4in long. The lights are 12v and 25 watts per tube. We recommend 2 lights per shelf 10in above the tray for the best growing conditions. Our manufactures states that the lights will last 50,000 hours, the lights we have on our vertical farm are over 5 years old and still going strong. We warranty the lights and power supply for 1 year. Includes light hanging hardware for a wire rack