... 2cm4.Working temperature: -20 --- 60 degree,Color chromaticity:Standard light source : D65 Observation condition: 45/0 Observation angle: 2 ... large format billboard, street banner, wall AD, light box, bus shelter,subway advertisements, light box, X banners, marketplace advertisement,roadside advertisement ... , reflective crashworthy barrel, temporary work signs,industrial safety sign, fence AD etc.