{"product_id":"tdrk-series-led-troffer-retrofit-kit","title":"TDRK Series LED Troffer Retrofit Kit","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe TDRK LED Troffer Retrofit Kit is designed for upgrading existing \u003ca href=\"\/collections\/led-ceiling-lights\" title=\"LED Ceiling Lights\"\u003ecommercial ceiling systems\u003c\/a\u003e without complete fixture replacement. Engineered as a retrofit solution for 1×4, 2×2, and 2×4 troffer housings, the system allows existing installations to be modernized with higher efficiency, selectable output, and integrated control compatibility while maintaining the original ceiling infrastructure.\u003c\/p\u003e\n\n\u003cp\u003eThis retrofit platform enables \u003ca href=\"\/pages\/lumens-in-commercial-lighting-what-lumen-output-means-how-it-is-measured-and-how-to-specify-it-correctly\" title=\"Lumens in Commercial Lighting: What Lumen Output Means, How It Is Measured, and How to Specify It Correctly\"\u003elumen output\u003c\/a\u003e and wattage to be adjusted through switch-selectable configurations, allowing performance to be matched to mounting height, spacing, and target illumination levels. Field-selectable \u003ca href=\"\/pages\/color-temperature-in-commercial-lighting-kelvin-scale-application-standards-and-specification-strategy\" title=\"Color Temperature in Commercial Lighting: Kelvin Scale, Application Standards, and Specification Strategy\"\u003eCCT options\u003c\/a\u003e provide consistent color performance across retrofit projects without requiring multiple SKUs.\u003c\/p\u003e\n\n\u003cp\u003eA built-in control receptacle supports integration with occupancy sensors, daylight harvesting systems, and Bluetooth-enabled control devices, allowing fixture-level control upgrades without rewiring. This supports compliance with \u003ca href=\"\/blogs\/resources-and-education-on-lighting\/title-24-ashrae-90-1-2026-mandatory-lighting-controls-for-every-commercial-square-foot\" title=\"Title 24 \u0026amp; ASHRAE 90.1-2026: Mandatory Lighting Controls for Every Commercial Square Foot\"\u003emodern commercial lighting control requirements\u003c\/a\u003e while reducing installation time.\u003c\/p\u003e\n\n\u003cp\u003eWith efficacy up to 150 lumens per watt and a rated life exceeding 100,000 hours, the TDRK retrofit system improves energy performance and reduces maintenance cycles across existing lighting installations. As part of a broader \u003ca href=\"\/collections\/led-troffer-lights\" title=\"LED Troffer Lights\"\u003eLED troffer lighting\u003c\/a\u003e strategy, the TDRK provides a practical pathway for upgrading \u003ca href=\"\/collections\/led-commercial-lighting\" title=\"Commercial LED Lighting\"\u003ecommercial lighting systems\u003c\/a\u003e without full fixture replacement.\u003c\/p\u003e\n\n\n\n\u003ch2\u003eFixture Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/input-voltage-in-commercial-lighting-electrical-requirements-system-compatibility-and-specification-standards\" title=\"Input Voltage in Commercial Lighting: Electrical Requirements, System Compatibility, and Specification Standards\"\u003eVoltage\u003c\/a\u003e: 120–277V\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/color-temperature-in-commercial-lighting-kelvin-scale-application-standards-and-specification-strategy\" title=\"Color Temperature in Commercial Lighting: Kelvin Scale, Application Standards, and Specification Strategy\"\u003eCCT\u003c\/a\u003e: 3500K, 4000K, 5000K\u003c\/li\u003e\n\u003cli\u003eCRI: 80\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/detailed-guide-to-dimming-in-commercial-lighting-covers-0-10v-dimming-driver-compatibility-control-methods-common-issues-and-specification-guidelines\" title=\"Dimming in Commercial Lighting: Control Methods, Driver Compatibility, and Specification Guidelines\"\u003eDimming\u003c\/a\u003e: 0–10V\u003c\/li\u003e\n\u003cli\u003eConstruction: Sheet Metal Retrofit Assembly with Frosted PC Lens\u003c\/li\u003e\n\u003cli\u003eMounting: Retrofit Installation into Existing Troffer Housing\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: -4°F to 122°F (-20°C to 50°C)\u003c\/li\u003e\n\u003cli\u003eEfficacy: Up to 150 lm\/W\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/rated-lifespan-in-commercial-lighting-led-l70-life-expectancy-and-performance-degradation-explained\" title=\"Rated Lifespan in Commercial Lighting: LED L70 Life Expectancy and Performance Degradation Explained\"\u003eRated Life\u003c\/a\u003e: L70 \u0026gt; 100,000 Hours\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/certifications-in-commercial-lighting-ul-dlc-fcc-and-compliance-standards-explained\" title=\"Certifications in Commercial Lighting: UL, DLC, FCC, and Compliance Standards Explained\"\u003eCertifications\u003c\/a\u003e: UL Listed (Damp Location), FCC, DLC Premium 5.1, TAA Compliant\u003c\/li\u003e\n\u003cli\u003eWarranty: 5-Year Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\n\n\u003ch2\u003ePerformance \u0026amp; Configurations\u003c\/h2\u003e\n\n\u003ch3\u003e1×4 Retrofit Kit (TDRK 14)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/lumens-in-commercial-lighting-what-lumen-output-means-how-it-is-measured-and-how-to-specify-it-correctly\" title=\"Lumens in Commercial Lighting: What Lumen Output Means, How It Is Measured, and How to Specify It Correctly\"\u003eLumen Output\u003c\/a\u003e: 2,700 \/ 3,750 \/ 4,500 lumens\u003c\/li\u003e\n\u003cli\u003eWattage: 18W \/ 25W \/ 30W\u003c\/li\u003e\n\u003cli\u003eApplication Use: Retrofit of linear troffers in corridors and narrow layouts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e2×2 Retrofit Kit (TDRK 22)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLumen Output: 2,700 \/ 3,750 \/ 4,500 lumens\u003c\/li\u003e\n\u003cli\u003eWattage: 18W \/ 25W \/ 30W\u003c\/li\u003e\n\u003cli\u003eApplication Use: Retrofit of standard grid troffer systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e2×4 Retrofit Kit (TDRK 24)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLumen Output: 3,750 \/ 4,500 \/ 5,250 lumens\u003c\/li\u003e\n\u003cli\u003eWattage: 25W \/ 30W \/ 35W\u003c\/li\u003e\n\u003cli\u003eApplication Use: Retrofit of larger open-area troffers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\n\n\u003ch2\u003eRetrofit Installation Advantages\u003c\/h2\u003e\n\u003cp\u003eThe TDRK is designed to integrate directly into existing troffer housings using included mounting hardware, eliminating the need for full fixture removal. This reduces installation time, minimizes disruption to ceiling systems, and lowers overall project costs compared to full fixture replacement.\u003c\/p\u003e\n\n\u003cp\u003eBy retaining the original housing while upgrading the light engine and controls, retrofit projects can achieve improved performance while maintaining existing layout geometry and electrical infrastructure.\u003c\/p\u003e\n\n\n\n\u003ch2\u003eControls and System Integration\u003c\/h2\u003e\n\u003cp\u003eThe integrated control receptacle supports plug-and-play deployment of occupancy sensors, daylight harvesting controls, and Bluetooth-enabled lighting systems. This enables advanced lighting strategies such as zoning, scheduling, and energy monitoring without modifying the existing wiring layout.\u003c\/p\u003e\n\n\u003cp\u003eSupport for luminaire-level lighting control (LLLC) allows scalable upgrades across large facilities while maintaining consistent control architecture.\u003c\/p\u003e\n\n\n\n\u003ch2\u003eOptical and Distribution Characteristics\u003c\/h2\u003e\n\u003cp\u003eThe frosted lens system provides uniform light distribution across the fixture aperture while reducing glare and eliminating visible LED imaging. Optical performance should be evaluated alongside \u003ca href=\"\/pages\/beam-angle-and-light-distribution-in-commercial-lighting-how-optics-affect-coverage-uniformity-and-performance\" title=\"Beam Angle and Light Distribution in Commercial Lighting: How Optics Affect Coverage, Uniformity, and Performance\"\u003edistribution and spacing characteristics\u003c\/a\u003e to ensure consistent illumination across the task plane.\u003c\/p\u003e\n\n\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCommercial retrofit lighting projects\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/led-office-lighting\" title=\"LED Office Lighting\"\u003eOffice lighting upgrades\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/led-school-classroom-lighting\" title=\"LED School \u0026amp; Classroom Lighting\"\u003eEducational facility retrofits\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/led-hospital-healthcare-lighting\" title=\"LED Hospital \u0026amp; Healthcare Lighting\"\u003eHealthcare lighting upgrades\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eCorridors and circulation areas\u003c\/li\u003e\n\u003cli\u003eExisting troffer system modernization\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Downloads\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"SLG TDRK Retrofit Troffer Kit Specification Sheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2010\/1417\/files\/TDRK_G1_SpecSheet.pdf?v=1777411722\" target=\"_blank\"\u003eSpecification Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"SLG TDRK Retrofit Troffer Kit Installation Instructions\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2010\/1417\/files\/TDRK_G1_InstallationGuide.pdf?v=1777411722\" target=\"_blank\"\u003eInstallation Instructions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"SLG 5-Year Product Warranty\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2010\/1417\/files\/SLG_5_Year_Product_Warranty.pdf?v=1769481990\" target=\"_blank\"\u003eWarranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eShop All: \u003ca title=\"Shop all LED Commercial Lighting\" href=\"\/collections\/led-commercial-lighting\"\u003eLED Commercial Lighting\u003c\/a\u003e | \u003ca title=\"Shop all LED Ceiling Lights\" href=\"\/collections\/led-ceiling-lights\"\u003eLED Ceiling Lights\u003c\/a\u003e | \u003ca title=\"Shop all LED Panel Lights\" href=\"\/collections\/led-panel-lights\"\u003eLED Panel Lights\u003c\/a\u003e | \u003ca title=\"Shop all LED Pendant Lights\" href=\"\/collections\/led-pendant-lights\"\u003eLED Pendant Lights\u003c\/a\u003e | \u003ca title=\"Shop all LED Recessed Lighting\" href=\"\/collections\/led-recessed-lighting\"\u003eLED Recessed Lighting\u003c\/a\u003e | \u003ca title=\"Shop all LED Troffer Lights\" href=\"\/collections\/led-troffer-lights\"\u003eLED Troffer Lights\u003c\/a\u003e | \u003ca title=\"Shop all LED Wraparound Lights\" href=\"\/collections\/led-wraparound-lights\"\u003eLED Wraparound Lights\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"SLG Lighting","offers":[{"title":"1x4","offer_id":48104249688305,"sku":"TDRK 14 LS45 G1 FSK","price":109.0,"currency_code":"USD","in_stock":true},{"title":"2x2","offer_id":48104249721073,"sku":"TDRK 22 LS45 G1 FSK","price":99.0,"currency_code":"USD","in_stock":true},{"title":"2x4","offer_id":48104249753841,"sku":"TDRK 24 LS53 G1 FSK","price":129.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2010\/1417\/files\/slg-tdrk-series-2x2-led-retrofit-troffer-kit.jpg?v=1777412245","url":"https:\/\/starsandstripeslighting.com\/products\/tdrk-series-led-troffer-retrofit-kit","provider":"Stars and Stripes Lighting","version":"1.0","type":"link"}