Choosing between a tritium exit sign and a photoluminescent exit sign usually starts with the project condition, not the sign color. Use this guide as a practical starting point, then confirm the final choice against your project documents and the authority having jurisdiction.
Choose tritium when wiring, batteries, or maintenance access is the problem
Tritium exit signs are self-powered signs. They are commonly considered when the project needs an EXIT sign without electrical wiring, battery backup, or frequent maintenance access. They can also make sense for remote areas, long-term replacement planning, or locations where electrical work is impractical.
Choose photoluminescent when stored-light marking is specified and light exposure is confirmed
Photoluminescent exit signs use stored light. They should be reviewed around light exposure, viewing distance, mounting, and project acceptance. If the location does not receive reliable light exposure before an outage, request help before ordering.
Use quote review when the project is unclear
If the spec mentions state requirements, AHJ approval, unusual mounting, outdoor conditions, or replacement of an existing tritium sign, send the project details before buying. A short review can prevent ordering the wrong sign family.
