OmniGlow™ LightShape® Markers LightShape® Markers are ideal for color-coding environmental and atomspheric conditions in confined spaces and in emergency situations. Other uses include marking previously searched areas, identifying exit rountes, preventing trip and fall hazards and improving night visibility. Simply press, snap and shake to activate LightShape® Markers, then mount in critical areas with extra-strength adhesive to a wall, cloth, plastic or wood. Non-toxic, non-heat generating, waterproof, maintenance free, dependable 3" markers are safe and easy to use.