Exit Signs
High Lumen
A lumen is a measure of the amount of brightness of a lightbulb -- the higher the number of lumens, the brighter the lightbulb.
High Lumen Emergency Lights are much brighter than the standard emergency light.
Thermoplastic
Thermoplastic is a material, a polymer, that becomes pliable or moldable above a specific temperature and solidifies upon cooling.
Red Letter
New York City and Chicago require exit signs to have red letters
Black
Most product that have black housing color are made of a thermoplastic material.