Building Code Glossary
Photoluminescent: Building Code Definition
How the IBC 2009, IFC 2009 define photoluminescent, where the wording differs, and which chapters depend on the term.
On this page
Last updated September 7, 2026 · Definitions quoted from the 2009 International Codes as transcribed in this site's building-codes collection, with the source chapter linked for each quotation. Usage counts are computed over the chapters hosted here, one copy per code. The [ICC code library](https://codes.iccsafe.org/codes) publishes the current model text and the [ICC adoption maps](https://www.iccsafe.org/advocacy/code-adoption-maps/) show which edition a jurisdiction has adopted; those sources control.
Direct answer
Photoluminescent is a defined term in the International Building Code (IBC) 2009, in Means of Egress. The code's own words are: “Having the property of emitting light that continues for a length of time after excitation by visible or invisible light has been removed.” The IFC 2009 carries the same definition word for word, so the term means the same thing in each. The term is used in 4 chapters of this corpus, most often in Means of Egress (IBC 2009), Means of Egress (IFC 2009), Definitions (IBC 2009). These pages transcribe the 2009 model text; verify the definition against the edition and amendments your authority having jurisdiction has adopted. Record the jurisdiction, the adopted edition, the application date and any local amendment that rewrites the definition before you use it on a live project, because a term redefined by amendment changes every requirement that depends on it.
Content and cited inputs reviewed by Scott Barrington, Harth founder and architectural technology specialist · Published 2026-09-07 · Updated 2026-09-07.
What does this term mean?
Photoluminescent — IBC 2009, Means of Egress:
Having the property of emitting light that continues for a length of time after excitation by visible or invisible light has been removed.
What must be verified before using this guidance?
Two of the I-Codes in this corpus define Photoluminescent, in identical words.
| Code | Where it is defined | Definition |
|---|---|---|
| IBC 2009 | Means of Egress | Having the property of emitting light that continues for a length of time after excitation by visible or invisible light has been removed. |
| IFC 2009 | Means of Egress | Having the property of emitting light that continues for a length of time after excitation by visible or invisible light has been removed. |
Where photoluminescent is used in the code
The term appears in 4 chapters of the 2009 I-Codes hosted here. The chapters that lean on it hardest are the ones to read next.
| Chapter | Code | Mentions |
|---|---|---|
| Means of Egress | IBC 2009 | 5 |
| Means of Egress | IFC 2009 | 5 |
| Definitions | IBC 2009 | 1 |
| Definitions | IFC 2009 | 1 |
The term in use
How the code actually writes about photoluminescent, quoted from the 2009 text hosted here:
Electrically powered, self-luminous and photoluminescent exit signs shall be listed and labeled in accordance with UL 924 and shall be installed in accordance with the manufacturer's instructions and Chapter 27.
Such materials shall include, but are not limited to, self-luminous materials and photoluminescent materials.
Photoluminescent: what to open, and in what order
Every row is a document this term depends on. The ICC code library and the ICC adoption maps cover the middle rows.
| Check | Where | Confirmed |
|---|---|---|
| Read the definition in the adopted IBC | Means of Egress | |
| Read the definition in the adopted IFC | Means of Egress | |
| Re-check the requirement that uses it | Means of Egress (IBC 2009) | |
| Re-check the requirement that uses it | Means of Egress (IFC 2009) | |
| Re-check the requirement that uses it | Definitions (IBC 2009) | |
| Re-check the requirement that uses it | Definitions (IFC 2009) | |
| Local amendment to any of the above | Jurisdiction's amendment list |
A research aid, not a code determination. The authority having jurisdiction decides which edition and which amendments apply.
Where can you explore related guidance?
- Explore all glossary guidance
- Public Way: Building Code Definition
- Stairway: Building Code Definition
- Guard: Building Code Definition
- Stair: Building Code Definition
Sources and method
Definitions quoted from the 2009 International Codes as transcribed in this site's building-codes collection, with the source chapter linked for each quotation. Usage counts are computed over the chapters hosted here, one copy per code. The ICC code library publishes the current model text and the ICC adoption maps show which edition a jurisdiction has adopted; those sources control.
Source links
Frequently asked questions
What is the code definition of photoluminescent?
The International Building Code (IBC) 2009 defines it in Means of Egress as: “Having the property of emitting light that continues for a length of time after excitation by visible or invisible light has been removed.” The 2009 model text is reproduced here; the definition that binds your project is the one in the edition your jurisdiction has adopted, as amended locally.
Which parts of the code depend on photoluminescent?
In this corpus the term is used across 4 chapters, led by Means of Egress in the IBC 2009. Those are the sections whose scope moves if the definition is amended locally, so read them together with Chapter 2 rather than on their own.
What does photoluminescent mean?
In the 2009 I-Codes hosted here it is a defined term rather than a description. The IBC 2009 states, in Means of Egress: “Having the property of emitting light that continues for a length of time after excitation by visible or invisible light has been removed.” It is defined in IBC 2009, IFC 2009. Because it is a defined term, whatever the adopted edition says it means is what every section using it means — so check Chapter 2 of that edition and any local amendment before relying on this wording.
Related pages
- Permit: Building Code Definition
Permit — IBC 2009 definition: An official document or certificate issued by the authority having jurisdiction which authorizes performance of a …
- Person: Building Code Definition
Person — IBC 2009 definition: An individual, heirs, executors, administrators or assigns, and also includes a firm, partnership or corporation, its …
- Personal Care Service: Building Code Definition
Personal Care Service — IBC 2009 definition: The care of residents who do not require chronic or convalescent medical or nursing care.
- Physical Hazard: Building Code Definition
Physical Hazard — IBC 2009 definition: A chemical for which there is evidence that it is a combustible liquid, cryogenic fluid, explosive …
- Physiological Warning Threshold Level: Building Code Definition
Physiological Warning Threshold Level — IBC 2009 definition: A concentration of air-borne contaminants, normally expressed in parts per million (ppm) or milligrams per cubic …
- Pier: Building Code Definition
Pier — IFC 2009 definition: A structure built over the water, supported by pillars or piles, and used as a landing …