The advanced technology of LED chip and package manufacturers as well as the declined market price has allowed LED lighting applications to be more diverse, and LED based-plant factories have also become the target market of global first-tier LED manufacturers. In fact, the idea of growing plants with electric lights has already been proposed in 1950 and implemented in 1970 (using traditional lighting products). Their goal was to grow high quality crops throughout the year and avoid damage caused by natural conditions and the excessive use of pesticides.