3M Diamond Grade Translucent DG³ Reflective Sheeting Series 4090T features the most efficient retroreflective prism design currently available from 3M for use on vertical traffic control signs, offering industry-leading retroreflectivity, conspicuity, and legibility due to its highly efficient retroreflective optics. It helps improve safety by providing higher luminance values at distances most critical to drivers, returning light to drivers under a diverse set of nighttime viewing geometries encountered by the driving public.Translucent DG³ sheeting is intended for use on internally illuminated sign faces where it is desirable to have a high level of diffuse light transmission from internal sources and a powerful reflective backup in case of light system failure.