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CTK Troffer Retrofit Kit

By Columbia Lighting 

Catalog ID: CTK24-2540

By Columbia Lighting
Catalog ID:  CTK24-2540
CTK 2x4 Retrofit Kit, 2500 Lumens, 4000K, Mounting Type: Recessed, Driver type: 0-10V dimming, Voltage Rating: 120-277V.
  • LED architectural retrofit for existing prismatic or parabolic troffers
  • integrated assembly for easy installation
  • 2x2 and 2x4 sizes
  • 80 CRI
  • 0-10V dimming to 10%
  • High efficiency UV stabilized polycarbonate frosted lens provides high performance without pixelation
  • DLC® (DesignLights Consortium) Premium Qualified. Please refer to the DLC website for specific product qualifications at www.designlights.org

More Options

Product Details


  • Classrooms and Offices
  • Halls/Dorms
  • Conference Room
  • Meeting Room
  • Common Areas
  • Education
Color White Housing
Color Rendering Index (CRI) 80 CRI
Color Temperature 4000 K
Construction Material - Main Steel
Dimming Protocol 0-10V
Dimming Range 10%
Driver type 0-10 V 10% dimming
Environmental Conditions Damp Location
Fixture Renovation Yes
LED Upgrade Kits Yes
Lamp Type LED Integrated
Lamp Type Actual LED
Light Output 2583 lm
Light Source LED
  • UL 1598
  • cULus
Material - Housing Steel
Max Ambient Temperature 25 °C
Min Ambient Temperature -20 °C
Mounting Type Recessed
New Products Yes
Product Category Retrofit Kit
Size Type 2x4 Nominal
Type Fixture Renovation Kits
UPC 840141400211
Warranty Length 5 year warranty. Terms and conditions apply.


Dimensions 48 in x 22.5 in x 3.07 in
Height 3.07 in
Length 48 in
Width 22.5 in

Electrical Ratings

Voltage Rating 120-277 V
Wattage 20 W

Certifications and Compliance

Certified Listed Location All luminaires are built to UL 1598 standards and bear appropriate cULus labels
DLC Designation DLC® (DesignLights Consortium) Qualified, with some Premium Qualified configurations - see www.designlights.org
Energy Efficient Yes
Industry Standard(s)
  • UL 1598 Damp Location
  • cULus Listed


Carton Quantity 1
Pallet Quantity 20