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Fluorescent Ballasts

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  • CARTON PACK, 2x F96T12HO, 120-277V, narrow 11 inch case, ELECTRONIC - main product image
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    CARTON PACK, 2x F96T12HO, 120-277V, narrow 11 inch case, ELECTRONIC

    KST-KTEB-2110-UV-TP-PIC /A-CP
    $73.92
    CARTON PACK, 2x F96T12HO, 120-277V, narrow 11 inch case, 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...
    Qty in Cart: 0
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    $73.92
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  • 1x F40T12, 120V, NPF, Electronic - main product image
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    1x F40T12, 120V, NPF, Electronic

    KST-KTEB-140-1-TP-EMI /C-DP
    $21.85
    1x F40T12, 120V, NPF, 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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    $21.85
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  • 1xF32T8, 120 V - main product image
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    1Xf32T8, 120 V

    KST-KTEB-132-1-TP-FC-CP
    $28.46
    1Xf32T8, 120 V 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 voltage 120V.Key Features...
    Qty in Cart: 0
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    $28.46
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  • 1x F32T8 or F40T12, 120V, NPF, Electronic
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    1x F32T8 or F40T12, 120V, NPF, Electronic

    KST-KTEB-132-1-TP-EMI-CP
    $28.46
    1x F32T8 or F40T12, 120V, NPF, 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...
    Qty in Cart: 0
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    $28.46
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  • 1xF28T5, 120V, NPF, Electronic, New Lead Length
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    1xF28T5, 120V, NPF, Electronic, New Lead Length

    KST-KTEB-128-1-TP-FC-PH /D-CP
    $51.31
    1xF28T5, 120V, NPF, Electronic, New Lead Length 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...
    Qty in Cart: 0
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    $51.31
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  • Electronic Fluorescent Ballast, 120V, KTEB-126-1-TP
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    Electronic Fluorescent Ballast, 120V, KTEB-126-1-TP

    KST-KTEB-126-1-TP
    $54.08
    Electronic Fluorescent Ballast, 120V, KTEB-126-1-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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    $54.08
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  • 1 LITE 15 / 20W, 120V, Small Plastic Case, NPF ELECTRONIC. HTS CODE: 8504.10.00
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    1 LITE 15 / 20W, 120V, Small Plastic Case, NPF ELECTRONIC. HTS CODE: 8504.10.00

    KST-KTEB-120-1-TP-CP
    $21.69
    1 LITE 15 / 20W, 120V, Small Plastic Case, NPF ELECTRONIC. HTS CODE: 8504.10.00 is a Keystone electronic fluorescent for replacement and maintenance work where electrical compatibility must match the fixture.This Keystone item is configured for...
    Qty in Cart: 0
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    $21.69
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  • 1x F14T5, 120V, ELECTRONIC, new lead lengths - main product image
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    1x F14T5, 120V, ELECTRONIC, new lead lengths

    KST-KTEB-114-1-TP-FC /P-CP
    $34.08
    1x F14T5, 120V, ELECTRONIC, new lead lengths 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...
    Qty in Cart: 0
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    $34.08
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  • Electronic Fluorescent Ballast, 120V, KTEB-113-1-TP-SN-MB
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    Electronic Fluorescent Ballast, 120V, KTEB-113-1-TP-SN-MB

    KST-KTEB-113-1-TP-SN-MB
    $56.85
    Electronic Fluorescent Ballast, 120V, KTEB-113-1-TP-SN-MB 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...
    Qty in Cart: 0
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    $56.85
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  • Undercabinet Ballast for 1xF8T5, 120V, ELECTRONIC, new lead length. Item formerly known as KTEB-108-1-TP-FC-CP
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    Undercabinet Ballast for 1xF8T5, 120V, ELECTRONIC, new lead length. Item formerly known as KTEB-108-1-TP-FC-CP

    KST-KTEB-108-1-TP-FC /L-CP
    $27.08
    Undercabinet Ballast for 1xF8T5, 120V, ELECTRONIC, new lead length. Item formerly known as KTEB-108-1-TP-FC-CP 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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    $27.08
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  • Emergency Ballast: 750 Lumen, 4 Pin CFL - main product image
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    Emergency Ballast: 750 Lumen, 4 Pin CFL

    KST-KT-EMRG-750-CFL4 /B-DP
    $145.46
    Emergency Ballast: 750 Lumen, 4 Pin CFL is a Keystone 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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    $145.46
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  • Emergency Ballast: 700 Lumens, T8 / T12 - main product image
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    Emergency Ballast: 700 Lumens, T8 / T12

    KST-KT-EMRG-700 /B-DP
    $107.77
    Emergency Ballast: 700 Lumens, T8 / T12 is a Keystone fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key selection points include voltage...
    Qty in Cart: 0
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    $107.77
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  • Emergency Ballast: 500 Lumen, T5 - main product image
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    Emergency Ballast: 500 Lumen, T5

    KST-KT-EMRG-500-T5 /B-DP
    $201.85
    Emergency Ballast: 500 Lumen, T5 is a Keystone fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear fluorescent retrofit and maintenance projects. Key selection points include voltage 120/277V,...
    Qty in Cart: 0
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    $201.85
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  • Emergency Ballast: 500 Lumen, T8 / T12, Slim Case - main product image
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    Emergency Ballast: 500 Lumen, T8 / T12, Slim Case

    KST-KT-EMRG-500-SL /B-DP
    $102.69
    Emergency Ballast: 500 Lumen, T8 / T12, Slim Case is a Keystone 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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    $102.69
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  • Emergency Ballast for T12 / T8 lamps. 120 / 277V input, 500 Lumen, 90 Minutes. With instruction sheet, Test Switch and w - main product image
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    Emergency Ballast for T12 / T8 lamps. 120 / 277V input, 500 Lumen, 90 Minutes. With instruction sheet, Test Switch and w

    KST-KT-EMRG-500 /B-DP
    $94.00
    Emergency Ballast for T12 / T8 lamps. 120 / 277V input, 500 Lumen, 90 Minutes. With instruction sheet, Test Switch and w is a Keystone fluorescent for linear fluorescent retrofit and maintenance projects.This Keystone item is configured for linear...
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    $94.00
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  • Emergency Ballast: 1400 Lumens, 4-Pin Cfl, Cec T20 Compliant - main product image
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    Emergency Ballast: 1400 Lumens, 4-Pin CFL, Cec T20 Compliant

    KST-KT-EMRG-1400C-CFL4-DP
    $214.23
    Emergency Ballast: 1400 Lumens, 4-Pin CFL, Cec T20 Compliant is a Keystone fluorescent for replacement and maintenance work where electrical compatibility must match the fixture.This Keystone item is configured for replacement and maintenance work where...
    Qty in Cart: 0
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    $214.23
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  • Emergency Ballast: 1400 Lumen, T8 / T12, Low Profile - main product image
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    Emergency Ballast: 1400 Lumen, T8 / T12, Low Profile

    KST-KT-EMRG-1400-SL /B-DP
    $170.23
    Emergency Ballast: 1400 Lumen, T8 / T12, Low Profile is a Keystone fluorescent for warehouses, gyms, retail back-of-house areas, and industrial spaces.This Keystone item is configured for warehouses, gyms, retail back-of-house areas, and industrial...
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    $170.23
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  • Emergency Ballast: 1400 Lumen, T8 / T12 - main product image
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    Emergency Ballast: 1400 Lumen, T8 / T12

    KST-KT-EMRG-1400 /B-DP
    $160.08
    Emergency Ballast: 1400 Lumen, T8 / T12 is a Keystone 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...
    Qty in Cart: 0
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    $160.08
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  • KTEB-240-1-TP-PIC / B Series - main product image
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    Keystone 120V Black Replacement Ballast Series

    KST-KTEB-240-1-TP-PIC/B-SERIES
    $26.38
    Keystone 120V Black Replacement Ballast Series groups Keystone models in the same series so customers can choose the needed option without leaving the product page. It is suited for replacement and maintenance work where electrical compatibility must...
    Qty in Cart: 0
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    $26.38
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  • KTEB-220-1-TP-EMI / C Series - main product image
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    Keystone 13W 120V Replacement Ballast Series

    KST-KTEB-220-1-TP-EMI/C-SERIES
    $37.77
    Keystone 13W 120V Replacement Ballast Series groups Keystone models in the same series so customers can choose the needed option without leaving the product page. It is suited for replacement and maintenance work where electrical compatibility must match...
    Qty in Cart: 0
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    $37.77
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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.