Light-emitting diodes are used in applications as diverse as aviation lighting, automotive lighting, advertising, general lighting, and traffic signals. LED panel light source used in an experiment on plant and mushroom growth. To establish the optimum artificial light illumination method for Pleurotus eryngii in closed mushroom factory system, the effects of red LED light quality on growth was investigated. The humidity was maintained more than 90% and temperature was 15~16℃, and CO2 density was 500ppm. The fresh weightand height were higher under red LED light (650nm, 73.1 Pmol/m 2s) comparing with control (fluorescent lamp, 10~20 lux). β-aminoisobutyric acid and total phenol content were higher under red LED light (650nm, 73.1 Pmol/m2s).

• Woo-Sik Jo(Gyeongbuk Province Agricultural Technology Administration, Daegu 702-320, Korea)
• Chang-Yun Lee( Greenpeace Mushroom Co., Cheongdo-gun 714-851, 714-851, Korea) | Chang-Yun Lee
• Yong-Su Yoo( LIGHTEC KOREA, Gwangju 500-779, Korea) | Yong-Su Yoo
• Kwang-Deog Moon( College of Agricultural and Life Sciences, Kyungpook National University, Daegu 702-701, Korea) | Kwang-Deog Moon