Seed Starter Tray with LED Lights: These seed starter trays are an absolute dream for any gardener in planting season. Coming with LED lights and an adjustable timing controller, this seed starter kit allows you to provide plant seedlings with enough light Adjustable Humidity Vents and Drainage Holes: Our seed starter tray has holes on top and bottom for drainage and air exchange. A stand-out feature of this seed starting trays is adjustable brightness, it can cater to different stages of seedling development, essential for a variety of plants Timing Controller: It includes light switch has four time set, four hours(red), eight hours showing(green), twelve hours (blue) and eighteen hours (orange). By controlling its lighting time and brightness, you can make sure that plants receive appropriate amount of light at different stages Clear Design and Drain Holes: Our seed starter tray is transparent, allowing you to observe plant's development from different angles. Its cover creats enough space to ensure seedling to get better without feeling cramped. This plant germination trays provide temperature and humidity condition Easy to Use: This upgraded seed starter tray is super easy to use, and its light-weight design makes moving around conveniently. You just need to insert led lights into humidity dome, and plug its cable into 5 V/2 A or above power supply, our seedling starter trays are ready to work