This double pack of 40 cell seed trays is perfect for windowsill growing and a great way to get your seedlings off to a good start. Each of the 2 plastic propagators measures 38cm x 45.5cm x 12cm and comes with a base tray, transparent 40 cell seedling tray (with drainage holes), a clear lid, and 2 circular vent covers than can be used to adjust the heat and humidity of the tray. A pair of potting tools, seed dispenser and pack of 20 plant tags help make up the set. What makes this growing pack that little bit more special is the inclusion of a full spectrum USB light in the circular vent covers for each tray; the lights sit in the vents on top of the lid and are connected by cable to a USB power source such as a USB plug or power bank (not included). Once connected, the lights can be set to on or off, or you can make use of the timer function which works in blocks of 4, 8, 12 or 18 hours. The lights can also be brightened or dimmed using the on-cable control unit. When sunlight is at