To establish the optimum artificial light illumination method for Pleurotus eryngii in closed mushroom factory system, the effects of red/blue LED light quality on growth was investigated. The following parameters fresh weight, height, width, chromaticity and hardness of the pileus were considered for studying the effect of LED light on the growth of mushroom. Pleurotus eryngii : The humidity was maintained more than 90% and temperature was 15~16℃, and CO2 density was 500ppm. The fresh weight and height were higher under red LED light (650nm, 73.1 Pmol/m2s), green LED light (525nm,89.1Pmol/m2s) comparing with blue LED light (450nm,105.8Pmol/m2s).

• Woo-Sik Jo(Gyeongbuk Province Agricultural Technology Administration, Daegu 702-320, Korea)
• Yan-Qing Lu( College of Agricultural and Life Sciences, Kyungpook National University, Daegu 702-701, Korea) | Yan-Qing Lu
• Chang-Yun Lee( Greenpeace Mushroom Co., Cheongdo-gun 714-851, 714-851, Korea) | Chang-Yun Lee
• Kwang-Deog Moon( College of Agricultural and Life Sciences, Kyungpook National University, Daegu 702-701, Korea) | Kwang-Deog Moon