3M Diamond Grade Fluorescent Signs are 80 mil thick and offer 12+ years of durability.Fluorescent Object Markers are seen 75% quicker than conventional aluminum signs. The signs are three times as reflective as Hi-Intensity Grade signs and offer ten times the Engineer Grade signs’ reflectivity. The high-gloss fluorescent finish attracts attention and enhances visibility even when seen against a visually complex background or by a distracted driver.  Fluorescent signs appear to glow, even in the daytime. These signs are uniquely conspicuous at the most dangerous times of the day (at dawn and at early evening times).