This study examines the effects of lightemitting diode (LED) light and temperature on lettuce growth. For plant growth, we used an LED bar composed of red, white and blue LEDs (4:1:2). Six types of cultivation equipment were used to measure the temperature. To compare their effects, the heights of the lettuces and the water temperatures were measured. The results demonstrated that the lettuce growth was optimal at 25ºC.

• Pyo-Hwan Hong(Department of Electronics Engineering Catholic University of Daegu)
• Oh-Hoon Kwon(Department of Electronics Engineering Catholic University of Daegu, M2Lab, Inc)
• Dong-In Lee(M2Lab, Inc)
• Jong-Rak Park(TOPENG, Inc)
• Jeong Min Ha(Department of Electronics Engineering Catholic University of Daegu)
• Da Un Jeong(Department of Electronics Engineering Catholic University of Daegu)
• Seong Ho Han(Department of Electronics Engineering Catholic University of Daegu)
• Bonghwan Kim(Department of Electronics Engineering Catholic University of Daegu, Professor of Electronic Engineering) ☎