Fluorescent Ballasts

Unmatched ballasts backed by more than 75 years of expertise.

More than 75 years ago, we founded Keystone Technologies to make ballasts for fluorescent lamps. Today, our extensive portfolio of electronic ballasts covers all fluorescent lighting application needs and features a compact form factor suitable for a wide range of designs.

Dependability

Keystone ballasts are burned-in at the factory to ensure both exceptional performance and superior reliability. Once each fluorescent ballast is sealed and all assembly is complete, each unit is connected to the appropriate lamp and powered at full load for at least one hour. This burn-in testing eliminates virtually any manufacturing or component defects.

Tube ballasts

Keystone manufactures a full portfolio of fluorescent tube ballasts — including T12, T12HO, T8, T5, and T5HO — with a range of starting methods, ballast factors, case sizes, and features.

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CFL ballasts

Our CFL ballasts are made for a number of lamp types, can handle a range of wattages, and come in a variety of form factors.

PLL ballasts

Keystone PLL ballasts are manufacturered for the specific needs of compact fluorescent lamps, in numerous lengths, starting methods, and lamp numbers.

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Circline ballasts

Our circline ballasts support a range of lamp types in several sizes and power outputs.

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LED tube with Color Select

CFL replacement lamp with Color Select

Time for an upgrade?

If you’re looking to upgrade away from fluorescent to reliable, energy-efficient LED technology, Keystone offers numerous solutions, including our LED tubes and CFL replacement lamps. Many allow you to bypass the ballast and are available with a variety of adjustable features.

See LED Tubes See CFL Replacements