Emergency Ballasts for Fluorescent Lights

Add Battery Backup to Your Existing Fluorescent Fixtures

If the power goes out, your building still needs light so people can safely find their way to the exit. Emergency ballasts for fluorescent lights make that possible by turning a standard fluorescent fixture into an emergency light.

Instead of installing additional emergency fixtures throughout a building, an emergency ballast is installed inside the existing light fixture. When normal power is interrupted, the ballast automatically switches to battery power and keeps one lamp illuminated.

This simple upgrade helps maintain safe lighting in hallways, stairwells, offices, and other areas where emergency egress lighting is required.

At Exit Sign Warehouse, we offer a range of fluorescent emergency ballasts designed for common lamp types and fixture sizes. Whether you're working with T8, T5, or compact fluorescent lamps, there are options that make it easy to add dependable emergency lighting.

How Emergency Ballasts Work

An emergency ballast contains a rechargeable battery and control circuitry that monitors the building’s power supply. When the power fails, the ballast instantly switches to emergency mode and powers the lamp using stored battery energy.

Most models provide at least 90 minutes of emergency lighting, which meets common life safety and building code requirements.

Because the ballast works with the fixture already installed, it’s a practical solution for upgrading existing lighting systems without major changes to the ceiling layout.

Lumen Output Options

Emergency ballasts are available with different lumen outputs, depending on the lamp type and model. During emergency operation, the ballast typically powers one lamp at a reduced output designed to provide safe path-of-egress lighting.

Common emergency lumen ranges include:

• 300 – 500 lumens – Compact fixtures or small spaces

• 500 – 700 lumens – Standard office and hallway lighting

• 700 – 1400 lumens – Larger areas requiring more visibility

• 1400+ lumens – High output fixtures and larger commercial spaces

Choosing the right lumen output depends on the fixture type, lamp configuration, and the lighting level required by the building’s emergency lighting plan.

Common Options Available

Emergency ballasts come in several configurations to match different fixtures and lighting systems.

Typical options include:

• T8 emergency ballasts for standard fluorescent fixtures

• T5 emergency ballasts for high-efficiency lamps

• Compact fluorescent emergency ballasts

• Single lamp or multiple lamp operation

• High lumen output models for larger areas

• Universal voltage (120–277V) compatibility

Many models also include test switches and LED indicator lights so maintenance teams can easily confirm that the battery and system are working properly.

Where Emergency Ballasts Are Used

Fluorescent emergency ballasts are commonly installed in commercial and institutional buildings where dependable emergency lighting is required.

Typical applications include:

• Office buildings

• Schools and universities

• Hospitals and healthcare facilities

• Retail stores

• Warehouses

• Apartment buildings

• Stairwells and corridors

Because they integrate directly into existing fixtures, emergency ballasts are often used to provide emergency coverage without adding additional wall-mounted lights.

Frequently Asked Questions

What is an emergency ballast for fluorescent lights?

An emergency ballast is a battery-powered backup device that allows a fluorescent light fixture to operate during a power outage. It automatically switches to battery power and keeps one lamp illuminated for emergency lighting.

How many lumens does an emergency ballast produce?

Emergency ballasts typically provide between 300 and 1400 lumens, depending on the model and lamp type. The goal is to provide enough light for safe building evacuation rather than full normal lighting output.

How long do emergency ballasts keep lights on?

Most emergency ballasts provide at least 90 minutes of illumination during a power outage, which meets standard emergency lighting code requirements.

Can emergency ballasts power more than one lamp?

Some models power one lamp, while others can operate two lamps or higher output fixtures. The exact capability depends on the ballast model and fixture configuration.

Do emergency ballasts work with all fluorescent fixtures?

Emergency ballasts are designed for specific lamp types such as T8, T5, or compact fluorescent lamps. It's important to match the ballast to the fixture and lamp type to ensure proper operation.

How do you test an emergency ballast?

Most emergency ballasts include a test button and indicator light. Pressing the test button simulates a power outage so you can confirm the battery backup system is working.

How long does the battery last?

The rechargeable battery inside an emergency ballast typically lasts 5–7 years, depending on use and maintenance. Regular testing helps ensure reliable operation.

Why Buy Emergency Ballasts from Exit Sign Warehouse?

At Exit Sign Warehouse, we focus on reliable life-safety lighting products designed for commercial environments. Our emergency ballasts are selected for durability, compatibility, and dependable performance.

When you shop with us, you get:

• Commercial-grade emergency lighting equipment

• Multiple lumen output options

• Compatibility with common fluorescent lamp types

• Code-compliant emergency lighting solutions

• Fast shipping and knowledgeable support

Whether you're upgrading existing fixtures or maintaining building safety systems, emergency ballasts provide a simple and effective way to keep lights on when the power goes out.