Type C LED tubes with a driver you can trust.

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Keystone’s External Drive LED Type C tubes are ideal for customers with older fluorescent ballasts who want to maximize efficiency, but don’t want to install Type B linear voltage retrofit lamps. Our ExternalDrive LED system can be integrated with robust dimming and control functionality, helping to offset moderate labor and installation costs. It’s compatible with Keystone LED emergency backup solutions. Our Type C LED tubes offer high system efficacy, guaranteed system compatibility, and the greatest overall performance. Best of all, Type C LED tubes are eligible for unique rebate opportunities.

UL Type C LED tubes operate with a Keystone External LED driver that powers the lamp, rather than using an integrated driver or external fluorescent ballast as a power source. UL Type C involves electrical modification to the existing fixture, but the low-voltage outputs of the external LED driver are connected to the sockets instead of line voltage as with UL Type B.

Our External Drive tubes are designed to be powered only by Keystone drivers. We cannot guarantee the performance of our Type C tubes when powered by drivers from other manufacturers.

Benefits of Type C technology

  • More control with 0-10V dimming functions
  • Improved experience with low optical flicker
  • Unique rebate opportunities
  • High energy efficiency/ minimal driver loss
  • Improved surge protection and line immunity compared to Type B tubes
  • Reduced energy consumption and suitable for Title 24 installations

Download Type C Brochure

5 Year Warranty

Tech Specs

  • KT-LED8T8-24G-8xx-E
    Number
    of Lamps
    Driver Being
    Used With
    Input Voltage
    of Driver
    CRI Color Temp Nominal Input Power Nominal Lumens Nominal Efficacy Power Factor Dimming Type Spec Sheet
    1 Lamp KTLD-2LT8-UV-8C-VDIM 120-277V >83 3000K 9W 1110 lm 122 lm/W >.9 0-10V Download
    3500K 9W 1125 lm 125 lm/W
    4000K 9W 1150 lm 128 lm/W
    5000K 9W 1200 lm 133 lm/W
    2 Lamp KTLD-2LT8-UV-8C-VDIM 120-277V >83 3000K 18W 2200 lm 122 lm/W >.9 0-10V Download
    3500K 18W 2250 lm 125 lm/W
    4000K 18W 2300 lm 128 lm/W
    5000K 18W 2400 lm 133 lm/W
    3 Lamp KTLD-4LT8-UV-8C-VDIM 120-277V >83 3000K 27W 3300 lm 122 lm/W >.9 0-10V Download
    3500K 27W 3375 lm 125 lm/W
    4000K 27W 3450 lm 128 lm/W
    5000K 27W 3600 lm 133 lm/W
    4 Lamp KTLD-4LT8-UV-8C-VDIM 120-277V >83 3000K 36W 4400 lm 122 lm/W >.9 0-10V Download
    3500K 36W 4500 lm 125 lm/W
    4000K 36W 4600 lm 128 lm/W
    5000K 36W 4800 lm 133 lm/W
  • KT-LED12T8-48G-8xx-E
    Number
    of Lamps
    Driver Being
    Used With
    Input Voltage
    of Driver
    CRI Color Temp Nominal Input Power Nominal Lumens Nominal Efficacy Power Factor Dimming Type Spec Sheet
    1 Lamp KTLD-2LT8-UV-12C-VDIM 120-277V >83 3000K 13W 1650 lm 127 lm/W >.9 0-10V Download
    3500K 13W 1700 lm 131 lm/W
    4000K 13W 1750 lm 135 lm/W
    5000K 13W 1800 lm 139 lm/W
    2 Lamp KTLD-2LT8-UV-12C-VDIM 120-277V >83 3000K 26W 3300 lm 127 lm/W >.9 0-10V Download
    3500K 26W 3400 lm 131 lm/W
    4000K 26W 3500 lm 135 lm/W
    5000K 26W 3600 lm 139 lm/W
    3 Lamp KTLD-4LT8-UV-12C-VDIM 120-277V >83 3000K 39W 4950 lm 127 lm/W >.9 0-10V Download
    3500K 39W 5100 lm 131 lm/W
    4000K 39W 5250 lm 135 lm/W
    5000K 39W 5400 lm 139 lm/W
    4 Lamp KTLD-4LT8-UV-12C-VDIM 120-277V >83 3000K 52W 6600 lm 127 lm/W >.9 0-10V Download
    3500K 52W 6800 lm 131 lm/W
    4000K 52W 7000 lm 135 lm/W
    5000K 52W 7200 lm 139 lm/W

Request a Lighting Layout

Keystone offers complementary lighting layout services for our products, to help take the next step in bringing your project to life. We can provide answers to your lighting questions to determine how many fixtures you need, what types of lamps are best for your applications, and how to save the maximum amount of energy, all within budget.

By utilizing industry leading lighting layout design software, we provide accurate and dependable application renderings. For new constructions or retrofit, simply provide Keystone with a few key project details, and our lighting designers will get to work on your request.

Request a Lighting Layout

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