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Fluorescent Ballasts

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  • 2xF54T5HO, 120-277V, Program Start, 9" Case, with integral leads - main product image
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    2xF54T5HO, 120-277V, Program Start, 9" Case, with integral leads

    KST-KTEB-254HO-UV-PS-SL-CP
    $66.85
    2xF54T5HO, 120-277V, Program Start, 9" Case, with integral leads is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects...
    Qty in Cart: 0
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    Price:
    $66.85
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  • 2xF54T5HO, 120-277V, Program Start, 90C Rated, with poke in connectors and lead wires poked in - main product image
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    2xF54T5HO, 120-277V, Program Start, 90C Rated, with poke in connectors and lead wires poked in

    KST-KTEB-254HO-UV-PS /A-DP
    $66.85
    2xF54T5HO, 120-277V, Program Start, 90C Rated, with poke in connectors and lead wires poked in is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit...
    Qty in Cart: 0
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    $66.85
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  • 2x F40T12, HPF, 120-277V, Electronic - main product image
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    2x F40T12, HPF, 120-277V, Electronic

    KST-KTEB-240-UV-TP-PIC-DP
    $27.92
    2x F40T12, HPF, 120-277V, Electronic is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key selection points include...
    Qty in Cart: 0
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    $27.92
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  • 2x F40T12, HPF, 120-277V, Electronic - main product image
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    2x F40T12, HPF, 120-277V, Electronic

    KST-KTEB-240-UV-TP-PIC-CP
    $27.92
    2x F40T12, HPF, 120-277V, Electronic is a Keystone electronic fluorescent for replacement and maintenance work where electrical compatibility must match the fixture.This Keystone item is configured for replacement and maintenance work where electrical...
    Qty in Cart: 0
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    Price:
    $27.92
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  • 1 or 2 F24T5HO or F39T5HO, 120-277V, 90C rated, 9" case - main product image
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    1 or 2 F24T5HO or F39T5HO, 120-277V, 90C rated, 9" case

    KST-KTEB-239HO-UV-PS-SL-CP
    $64.69
    1 or 2 F24T5HO or F39T5HO, 120-277V, 90C rated, 9" case is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key...
    Qty in Cart: 0
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    $64.69
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  • 2 Lite F17 / 25 / 32W T8, Residential Grade, Instant Start, 120V, Energy Star rated. Narrow Case, Electronic - main product image
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    2 Lite F17 / 25 / 32W T8, Residential Grade, Instant Start, 120V, Energy Star rated. Narrow Case, Electronic

    KST-KTEB-232RIS-1-TP-SL-CP
    $41.92
    2 Lite F17 / 25 / 32W T8, Residential Grade, Instant Start, 120V, Energy Star rated. Narrow Case, Electronic is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear...
    Qty in Cart: 0
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    $41.92
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  • 2 x F32T8, .88 BF, 120-277V, Instant Start, Electronic - main product image
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    2 x F32T8, .88 BF, 120-277V, Instant Start, Electronic

    KST-KTEB-232-UV-IS-N-P-DP
    $34.15
    2 x F32T8, .88 BF, 120-277V, Instant Start, Electronic is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key selection...
    Qty in Cart: 0
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    $34.15
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  • 2 x F32T8, .88 BF, 120-277V, Instant Start, Electronic - main product image
    Quick view

    2 x F32T8, .88 BF, 120-277V, Instant Start, Electronic

    KST-KTEB-232-UV-IS-N-P-CP
    $34.15
    2 x F32T8, .88 BF, 120-277V, Instant Start, Electronic is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key selection...
    Qty in Cart: 0
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    $34.15
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  • 2xF32T8, 0.77BF, 120-277V - main product image
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    2Xf32T8, 0.77Bf, 120-277V

    KST-KTEB-232-UV-IS-L-P-DP
    $31.46
    2Xf32T8, 0.77Bf, 120-277V is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key selection points include wattage 26W,...
    Qty in Cart: 0
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    $31.46
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  • 2 x F32T8, .77 BF, 120-277V, Instant Start, Electronic - main product image
    Quick view

    2 x F32T8, .77 BF, 120-277V, Instant Start, Electronic

    KST-KTEB-232-UV-IS-L-P-CP
    $31.46
    2 x F32T8, .77 BF, 120-277V, Instant Start, Electronic is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key selection...
    Qty in Cart: 0
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    $31.46
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  • 2 x F32T8, 1.18BF, 120-277V, Instant Start, Electronic - main product image
    Quick view

    2 x F32T8, 1.18BF, 120-277V, Instant Start, Electronic

    KST-KTEB-232-UV-IS-H-P-CP
    $36.54
    2 x F32T8, 1.18BF, 120-277V, Instant Start, Electronic is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key selection...
    Qty in Cart: 0
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    $36.54
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  • 2xF28T5HE, 120-277V, HPF, 9" Case, Integral leads - main product image
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    2xF28T5HE, 120-277V, HPF, 9" Case, Integral leads

    KST-KTEB-228HE-UV-PS-SL-CP
    $69.77
    2xF28T5HE, 120-277V, HPF, 9" Case, Integral leads is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key selection...
    Qty in Cart: 0
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    $69.77
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  • 1 or 2x F28T5HE (also 1 / 2 F14T5 or 1 / 2 F21T5). Multivolt 120-277V, 90C Case Temp. Program Start, With Leads. Electro - main product image
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    1 or 2x F28T5HE (also 1 / 2 F14T5 or 1 / 2 F21T5). Multivolt 120-277V, 90C Case Temp. Program Start, With Leads. Electro

    KST-KTEB-228HE-UV-PS-CP
    $69.77
    1 or 2x F28T5HE (also 1 / 2 F14T5 or 1 / 2 F21T5). Multivolt 120-277V, 90C Case Temp. Program Start, With Leads. Electro is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for...
    Qty in Cart: 0
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    $69.77
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  • 2x F14 / 21 / 28 T5 High Efficiency Lamps. NPF, 120V, Electronic. New Wire Length
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    2x F14 / 21 / 28 T5 High Efficiency Lamps. NPF, 120V, Electronic. New Wire Length

    KST-KTEB-228-1-TP-PH-SL /B-CP
    $54.08
    2x F14 / 21 / 28 T5 High Efficiency Lamps. NPF, 120V, Electronic. New Wire Length is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and...
    Qty in Cart: 0
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    $54.08
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  • KTEB-228-1-TP-PH For (2) F28T5 or (2) F21T5HE lamp 120V 60 HZ
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    KTEB-228-1-TP-PH For (2) F28T5 or (2) F21T5HE lamp 120V 60 HZ

    KST-KTEB-228-1-TP-PH
    $54.08
    KTEB-228-1-TP-PH For (2) F28T5 or (2) F21T5HE lamp 120V 60 HZ is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key...
    Qty in Cart: 0
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    $54.08
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  • Electronic Fluorescent Ballast, 120V, KTEB-226-1-TP
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    Electronic Fluorescent Ballast, 120V, KTEB-226-1-TP

    KST-KTEB-226-1-TP
    $51.31
    Electronic Fluorescent Ballast, 120V, KTEB-226-1-TP is a Keystone electronic fluorescent for replacement and maintenance work where electrical compatibility must match the fixture.This Keystone item is configured for replacement and maintenance work...
    Qty in Cart: 0
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    $51.31
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  • Electronic Ballast for 2x F28T5, or 2x F21T5 or 2x F14T5, 120Volt, NPF
    Quick view

    Electronic Ballast for 2x F28T5, or 2x F21T5 or 2x F14T5, 120Volt, NPF

    KST-KTEB-221PS-1-TP
    $48.38
    Electronic Ballast for 2x F28T5, or 2x F21T5 or 2x F14T5, 120Volt, NPF is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects...
    Qty in Cart: 0
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    $48.38
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  • Undercabinet Ballast for 2xF13T5, 120V, Electronic
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    Undercabinet Ballast for 2xF13T5, 120V, Electronic

    KST-KTEB-213-1-TP-SL-MB-CP
    $40.46
    Undercabinet Ballast for 2xF13T5, 120V, Electronic is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key selection...
    Qty in Cart: 0
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    $40.46
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  • Replacement - main product image
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    Replacement

    KST-KTEB-213-1-TP-SC-RJS
    $44.62
    Replacement is a Keystone electronic fluorescent for replacement and maintenance work where electrical compatibility must match the fixture.This Keystone item is configured for replacement and maintenance work where electrical compatibility must match...
    Qty in Cart: 0
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    $44.62
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  • 2x F96T12HO, 120-277V, Electronic - main product image
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    2x F96T12HO, 120-277V, Electronic

    KST-KTEB-2110-UV-TP-PIC /A-DP
    $73.92
    2x F96T12HO, 120-277V, Electronic is a Keystone electronic fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key selection points include...
    Qty in Cart: 0
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    $73.92
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  • Total: items /

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Fluorescent ballasts regulate the electrical supply to fluorescent lamps, providing the starting voltage required to ignite the arc and then limiting current during operation to prevent the lamp from drawing excessive power. Without a properly matched ballast, a fluorescent lamp will either fail to start or burn out prematurely, making ballast selection and maintenance a routine part of commercial facility upkeep.

Electronic ballasts have largely replaced older magnetic (core-and-coil) designs in commercial applications, offering higher efficiency, quieter operation, and reduced lamp flicker. Most modern electronic ballasts operate at high frequency (typically 20,000 Hz or above), which eliminates the 60 Hz flicker associated with older magnetic ballasts and improves lamp life. Instant-start, rapid-start, and programmed-start ballasts each have specific applications based on how frequently the lamps are cycled on and off.

RelightDepot carries fluorescent ballasts for the most common commercial lamp types, organized by tube size for fast lookup. Browse T8 Ballasts for the most widely used commercial fluorescent size, T5 and T5HO Ballasts for high-output linear applications. Emergency backup units are available in the Fluorescent Emergency Ballasts section. The full Ballasts and Drivers catalog covers all ballast types in one section.