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Fluorescent Ballasts

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  • Ballast for UV-C Lamps. 120-277V input. Design to run 1 lamp not to exceed 100W Max Load. ~800mA Output. Linear Case Sty - main product image
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    Ballast for UV-C Lamps. 120-277V input. Design to run 1 lamp not to exceed 100W Max Load. ~800mA Output. Linear Case Sty

    KST-KTG100-1L-800-UV-PS-L2
    $50.77
    Ballast for UV-C Lamps. 120-277V input. Design to run 1 lamp not to exceed 100W Max Load. ~800mA Output. Linear Case Sty is a Keystone germicidal/uv-c for replacement and maintenance work where electrical compatibility must match the fixture.This...
    Qty in Cart: 0
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    $50.77
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  • 4x F54T5HO, 90C Rated, 120-277V, Program Start, with leads, Electronic - main product image
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    4x F54T5HO, 90C Rated, 120-277V, Program Start, with leads, Electronic

    KST-KTEB-454HO-UV-PS-DP
    $127.92
    4x F54T5HO, 90C Rated, 120-277V, Program Start, with leads, 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...
    Qty in Cart: 0
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    Price:
    $127.92
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  • 4x F54T5HO, 90C Rated, 120-277V, Program Start, with leads, Electronic - main product image
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    4x F54T5HO, 90C Rated, 120-277V, Program Start, with leads, Electronic

    KST-KTEB-454HO-UV-PS-CP
    $127.92
    4x F54T5HO, 90C Rated, 120-277V, Program Start, with leads, 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...
    Qty in Cart: 0
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    $127.92
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  • 4 Lite T8, Normal Power Factor, 120V, Narrow case - main product image
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    4 Lite T8, Normal Power Factor, 120V, Narrow case

    KST-KTEB-432RIS-1-TP-SL-CP
    $44.08
    4 Lite T8, Normal Power Factor, 120V, Narrow 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 selection...
    Qty in Cart: 0
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    $44.08
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  • 4 x F32T8, .88 BF, 120-277V, Instant Start, Electronic - main product image
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    4 x F32T8, .88 BF, 120-277V, Instant Start, Electronic

    KST-KTEB-432-UV-IS-N-P-DP
    $39.77
    4 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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    Price:
    $39.77
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  • 4 x F32T8, .88 BF, 120-277V, Instant Start, Electronic - main product image
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    4 x F32T8, .88 BF, 120-277V, Instant Start, Electronic

    KST-KTEB-432-UV-IS-N-P-CP
    $39.77
    4 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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    $39.77
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  • 4 x F32T8, .77 Ballast Factor, 120-277V - main product image
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    4 x F32T8, .77 Ballast Factor, 120-277V

    KST-KTEB-432-UV-IS-L-P-DP
    $37.38
    4 x F32T8, .77 Ballast Factor, 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...
    Qty in Cart: 0
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    $37.38
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  • 4xF32T8, 1.18 BF, 120-277V, Instant Start, Electronic - main product image
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    4xF32T8, 1.18 BF, 120-277V, Instant Start, Electronic

    KST-KTEB-432-UV-IS-H-P-DP
    $41.92
    4xF32T8, 1.18 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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    $41.92
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  • 3 x F32T8, .88 BF, 120-277V, Instant Start, Electronic - main product image
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    3 x F32T8, .88 BF, 120-277V, Instant Start, Electronic

    KST-KTEB-332-UV-IS-N-P-DP
    $37.85
    3 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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    $37.85
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  • 3 x F32T8, .88 BF, 120-277V, Instant Start, Electronic - main product image
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    3 x F32T8, .88 BF, 120-277V, Instant Start, Electronic

    KST-KTEB-332-UV-IS-N-P-CP
    $37.85
    3 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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    $37.85
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  • 3 x F32T8, .77BF, 120-277V, Instant Start, Electronic - main product image
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    3 x F32T8, .77BF, 120-277V, Instant Start, Electronic

    KST-KTEB-332-UV-IS-L-P-DP
    $35.46
    3 x F32T8, .77BF, 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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    $35.46
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  • 3 x F32T8, .77BF, 120-277V, Instant Start, Electronic - main product image
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    3 x F32T8, .77BF, 120-277V, Instant Start, Electronic

    KST-KTEB-332-UV-IS-L-P-CP
    $35.46
    3 x F32T8, .77BF, 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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    $35.46
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  • 3 x F32T8, 1.18BF, 120-277V, NEMA Premium, Electronic - main product image
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    3 x F32T8, 1.18BF, 120-277V, NEMA Premium, Electronic

    KST-KTEB-332-UV-IS-H-P-CP
    $39.77
    3 x F32T8, 1.18BF, 120-277V, NEMA Premium, 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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    $39.77
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  • Carton Pack, 2x F17 / 25 / 32W T8, Class B, Residential, Electronic
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    Carton Pack, 2x F17 / 25 / 32W T8, Class B, Residential, Electronic

    KST-KTEB-2C72-1-TP-CP
    $42.08
    Carton Pack, 2x F17 / 25 / 32W T8, Class B, Residential, 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...
    Qty in Cart: 0
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    $42.08
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  • 2x F96T8HO, 120-277V, Instant Start, Distributor Pack - main product image
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    2x F96T8HO, 120-277V, Instant Start, Distributor Pack

    KST-KTEB-286HO-UV-IS-N-DP
    $78.08
    2x F96T8HO, 120-277V, Instant Start, Distributor Pack 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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    $78.08
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  • 2x F96T12, 120-277V, 9" case - main product image
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    2x F96T12, 120-277V, 9" case

    KST-KTEB-275-UV-TP-PIC-SL-DP
    $45.54
    2x F96T12, 120-277V, 9" case 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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    $45.54
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  • 2xF96T12 Ballast, 120-277V Input, 9" Case - main product image
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    2xF96T12 Ballast, 120-277V Input, 9" Case

    KST-KTEB-275-UV-TP-PIC-SL-CP
    $45.54
    2xF96T12 Ballast, 120-277V Input, 9" Case 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...
    Qty in Cart: 0
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    $45.54
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  • 2x F96T12 75W & 60W, 120-277V, 11" case, Electronic - main product image
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    2x F96T12 75W & 60W, 120-277V, 11" case, Electronic

    KST-KTEB-275-UV-TP-PIC-DP
    $45.54
    2x F96T12 75W & 60W, 120-277V, 11" case, 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...
    Qty in Cart: 0
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    $45.54
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  • 2 Lite F96T12, 120V, 9" Case, Distributor Pack - main product image
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    2 Lite F96T12, 120V, 9" Case, Distributor Pack

    KST-KTEB-275-1-TP-PIC-SL-DP
    $41.85
    2 Lite F96T12, 120V, 9" Case, Distributor Pack 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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    $41.85
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  • 2xF96T8, 120-277V, Narrow Case, Distributor Pack - main product image
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    2xF96T8, 120-277V, Narrow Case, Distributor Pack

    KST-KTEB-259-UV-IS-N-DP
    $52.08
    2xF96T8, 120-277V, Narrow Case, Distributor Pack 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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    $52.08
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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.