A reflective sign is a sign that has retro-reflective sheeting to allow for easy visibility at night under the illumination of headlights. Nationally, older, non-reflective signs, including the bulk of button copy based signs, were mostly replaced with highly reflective signs. As a side effect of this transition, many states coupled replacements with the removal of sign lights to offset electricity and maintenance costs as newer reflectivity standards provide ample legibility in low lighting.