In some extent, yes. But it is mostly used as a necessary supplement nowadays. LightLead’s photoluminescent materials were originally designed to complement existing emergency lighting systems but continuous improvements in luminance performance mean that in certain circumstances high quality photoluminescent products can replace emergency lighting. They can be sited at waist or skirting level so they can still function if the ceiling lights become obscured by smoke. Similarly, life saving appliances and fire fighting equipment become more visible and are easily located in an emergency. Some emergency lighting can take up to 15 seconds to activate. In these instances, photoluminescence can be a lifesaver.