Lifetime plots for an equivalent OLED test pixel (circles) and large-area light panel (squares). Both lifetime measurements were taken at room temperature (20°C) at J = 10 mA/cm2. For the pixel, L
= 3,780 cd/m2, while for the panel L
= 3,800 cd/m2. Normalized luminance for the large area panel was calibrated for total light emission by measurement before and after life test inside a 20” integrating sphere.