1. Environmental Main Feature - Temperature Accuracy : ±0.5 °C - Humidity Range :  20 % R.H. ~ 95 %  R.H. - Internal Dimensions : 4,000 x 4,000 x 3,000 mm2. Sun Load Simulation System - Irradiated Area : over 3000 x 3000 mm (W * L) - Irradiance Intensity : Adjustable 400 to 1100 W/m2 - Surface Temperature : 100 °C~120 °C at 1.0 - 1.5m