Photoluminescent signs are so named because they are illuminated via the action of photoluminescence. Energy in the form of light (photons) is absorbed from their surroundings by the special coating and stored. This stored energy is then re-emitted as light, making the light "glow" when the building is dark. We carry in stock all types of Photoluminescent signs which include glow in the dark stair number signs.
DISCLAIMER to comply with the New York City Consumer Protection Law which applies to all businesses operating in New York City: HPD-signs.com is a small family-owned and family-operated Brooklyn-based business. HPD-signs.com is not a City of New York store nor are the website, products or services affiliated with the City of New York or any agency of the City of New York. HPD-signs.com itself, its business, website, products, services, or any hyperlinks from its website are not sponsored by, approved by, affiliated with, endorsed by, or connected to the City of New York or any agency of the City of New York, including but not limited to HPD, DOB, DOT, DSNY, FDNY directly or by implication.