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Tritium Exit Signs

Tritium Exit Signs – Self-Luminous

Tritium exit signs are fully self-luminous fixtures that require no electricity, batteries, or light exposure. These non-electric exit signs provide continuous illumination using tritium gas, a low-level radioactive isotope that emits visible light 24/7 for up to 10 or 20 years.

Ideal for areas without ambient light—such as stairwells, tunnels, mechanical rooms, and outdoor enclosures—tritium exit signs are UL 924 listed and NFPA 101 compliant when installed per code. They are a reliable option for no power exit sign installations where wiring is not feasible.

These self-luminous exit signs require no maintenance or testing during their rated lifespan and include expiration labeling for compliance. For lighted spaces with consistent illumination, you may also consider self-charging exit signs as an energy-free alternative.

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FAQs About Tritium Exit Signs

❓ Is a Tritium Exit Sign Right for My Building?

Tritium exit signs are ideal for facilities where electrical wiring is impractical or unavailable—such as tunnels, outdoor enclosures, or mechanical spaces. They are also excellent for reducing maintenance costs over time, since they require no batteries or electrical connections. Most buildings that fall under UL 924 and NFPA 101 compliance can use them, but check with your local fire marshal for location-specific restrictions.

❓ When to Use Tritium Exit Signs (No Power Required)

Use tritium exit signs in any area without consistent light exposure or electrical power. These include stairwells, emergency egress paths, military shelters, underground parking structures, and storage vaults. Their 10- or 20-year lifespan and self-luminous design make them an excellent “set it and forget it” solution for safety lighting.

❓ How do tritium exit signs work?

These signs use tritium gas to emit light continuously without electricity. Tritium emits low-energy beta radiation that excites phosphor coatings inside the sign, producing visible glow.

❓ Are tritium exit signs safe?

Yes. Tritium signs are sealed and regulated by the NRC. They emit low levels of radiation that are safe under normal use and pose no threat when intact.

❓ What are the disposal requirements?

Tritium signs must be returned to a licensed facility for proper radioactive disposal. Never discard them in regular waste streams.

❓ Are there alternatives to tritium signs?

Yes. In areas with consistent lighting,glow-in-the-dark exit signsoffer a non-radioactive, power-free alternative.

❓ Do tritium signs expire?

Yes. Depending on the model, they last 10, 15, or 20 years. Each sign includes an expiration date and must be properly disposed of when it reaches end-of-life.

❓ What is a nuclear exit sign?

“Nuclear exit sign” is a common term for atritium exit sign, which uses radioactive tritium gas to emit light continuously without electricity. These signs are self-powered, safe under normal use, and require no maintenance for 10–20 years.