---
title: "What Is Relamp? Electrical Glossary | Daniel Electric"
description: "To relamp is to replace the lamps (bulbs) in a fixture or building, either all at once on a schedule or one at a time as they fail."
url: https://danielelectric.multisites.ai/glossary/relamp
publisher: Daniel Electric
phone: +1-817-481-8606
quote: https://danielelectric.multisites.ai/contact
---

Lighting

# Relamp

To relamp is to replace the lamps (bulbs) in a fixture or building, either all at once on a schedule or one at a time as they fail.

The Pacific Northwest National Laboratory describes two methods: group relamping on a set schedule, and spot relamping as each lamp fails. The method changes how well light levels hold up over time, so the plan matters.

A relamp changes the lamp, not the fixture. A [retrofit](https://danielelectric.multisites.ai/glossary/retrofit) may change more. The lamp type must match the fixture, including any [ballast](https://danielelectric.multisites.ai/glossary/ballast). For large sites a planned relamp can cut repeat lift visits. See [commercial electrician](https://danielelectric.multisites.ai/commercial-electrician).

[Daniel Electric can helpCommercial electrician](https://danielelectric.multisites.ai/commercial-electrician)

## Related terms

-   [Retrofit](https://danielelectric.multisites.ai/glossary/retrofit)
-   [Ballast](https://danielelectric.multisites.ai/glossary/ballast)
-   [LED](https://danielelectric.multisites.ai/glossary/led)
-   [Light pole](https://danielelectric.multisites.ai/glossary/light-pole)

## Sources

1.  [Pacific Northwest National Laboratory: Lumen Maintenance and Light Loss Factors](https://www.pnnl.gov/main/publications/external/technical_reports/PNNL-22727.pdf)
2.  [Pacific Northwest National Laboratory: Lumen Maintenance and Light Loss Factors](https://www.pnnl.gov/main/publications/external/technical_reports/PNNL-22727.pdf)

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## Need an electrician in Southlake?

Call and tell us what is going on. A photo of the panel label or the problem helps us come prepared. Quotes on new installations are free.

[Call (817) 481-8606](tel:+1-817-481-8606)[Get a quote](https://danielelectric.multisites.ai/contact)

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