2 Packs, Seed Starter Trays with High Dome Germination Kit - 80 Cells, 4 LED Grow Lights, Smart Timer & 3 Modes for Home Gardene

>>How does the smart timer work?

1、Red light means 3 h on, 21 h off;
2、Blue light means 6 h on, 18 h off;
3、both red and blue light on means 12 h on, 12 h off.

Regardless of which mode is set, as long as the power is not disconnected, it will automatically light up every day thereafter.