T5 Ballasts – Electronic T5 & T5HO Fluorescent Replacement

Why Choose Our T5 Fluorescent Ballasts?

• Reliable performance – Precise current regulation protects lamps and extends their lifespan
• Energy-efficient options – Electronic ballasts reduce energy use and operate cooler and quieter
• Multiple start methods – Instant start for long operating cycles and programmed start for maximum lamp life with occupancy sensors
• Wide compatibility – Models for standard T5 (F14T5, F21T5, F28T5) and high-output T5HO (F54T5HO) lamps
• Universal voltage available – Many units accept 120–277V for flexible installation
• Easy replacements – Direct replacements for common OEM ballasts with standard wiring and case sizes

Common Applications

• Industrial high-bay and low-bay T5HO fixtures
• Commercial office and classroom lighting
• Undercabinet and task lighting (smaller T5 lamps)
• Warehouse and retail linear fluorescent systems
• Schools, hospitals, and institutional buildings

How to Choose the Right T5 Fluorescent Ballast

1. Lamp Type & Wattage
   Match the ballast to your lamps (example: F14T5, F28T5, or F54T5HO). Check the lamp type and wattage printed on the existing tubes.
2. Number of Lamps
   Select 1-lamp, 2-lamp, or 4-lamp ballasts according to the fixture configuration.
3. Start Method
   • Instant Start – Best for lights that stay on for long periods
   • Programmed Start – Ideal for frequent on/off cycles and occupancy sensors (longest lamp life)
4. Voltage
   Choose 120V for standard residential/commercial or universal 120–277V for broader compatibility.
5. Ballast Factor & Features
   Higher ballast factor = more light output. Look for electronic ballasts for quieter, cooler, and more efficient operation.

Brands We Carry

Keystone Technologies — professional-grade T5 and T5HO fluorescent ballasts built for reliable commercial and industrial use.

Why Buy from LeanLight?

• Fast & free shipping on every order (ships from Georgia, 1–5 day delivery in the USA)
• Volume and project discounts available
• 30-day satisfaction guarantee with easy returns
• Georgia-based lighting specialists focused on commercial and industrial solutions since 2008

Frequently Asked Questions

What does a T5 fluorescent ballast do?
A T5 fluorescent ballast provides the high voltage needed to start the lamp and then regulates the current so the lamp operates safely and efficiently without burning out.

What is the difference between T5 and T5HO ballasts?
Standard T5 ballasts operate lower-wattage high-efficiency lamps (F14T5, F21T5, F28T5). T5HO ballasts are designed for high-output lamps such as F54T5HO, commonly used in high-bay industrial fixtures.

Electronic vs. magnetic ballasts — which should I choose?
Electronic ballasts are quieter, more energy-efficient, run cooler, and produce less flicker. Most new T5 installations use electronic programmed-start ballasts.

How do I know which ballast I need?
Look at the existing ballast label or the lamps currently installed. Note the lamp type (T5 or T5HO), number of lamps, wattage, and voltage. You can also search by the old ballast model number for a direct cross-reference.

Do these ballasts work with LED tubes?
Some Type A (ballast-compatible) LED tubes can operate with existing fluorescent ballasts. For maximum efficiency, many users prefer ballast-bypass (Type B) LED tubes and remove the ballast entirely.