High Performance Relighting for Lensed Troffers

The ES8RT relight assembly is the ideal solution for renovating obsolete deep-lensed troffer systems when a one-for-one upgrade is desired. ES8RT louvered lighting systems provide exceptional efficiency and energy savings while providing even, glare-free lighting, higher vertical footcandles and reduced ceiling contrast for greater visual comfort. The ES8RT relight assembly is ideal for retail, educational, commercial and other general lighting applications.

The ES8RT delivers more balanced light levels vertically and horizontally while eliminating the "cave effect" produced by traditional parabolic fixtures and the glare associated with lensed troffers.

ES8RT provides substantial energy savings of up to 45% compared to a three-lamp T8 electronic ballast system and up to 56% savings compared to a three lamp ES magnetic system.

Relighting details (web site).


The ES8RT assembly consists of six primary components plus hardware. Universal end brackets containing the pre-wired ballast and sockets are constructed of 20-gauge powder-painted steel and are secured to the host fixture with provided TEK screws. A splice box is provided to enclose electrical connections, and a ballast disconnect plug system is provided as standard.

Splice box replaces the typical wireway by providing a cover for the connections of incoming supply wire and is attached to the host fixture with two TEK screws.

The reflector system uses a highly reflective white finish for optimum efficiency and attaches securely to the end brackets with quarter-turn fasteners.

Robust design, precision tooling and automated assembly combine to produce the industry's strongest louver. Trim kit to cover side reveals (if necessary) is provided as standard.


Mechanical optical shielding is provided with angled length blades and linear faceted cross baffles. A highly efficient reflector system directs the light downward. Lamp cut-outs maximize the shielding while minimizing overall assembly depth to provide consistent performance in any host fixture application. Vertical light levels are improved, providing a balanced amount of light across all surfaces while minimizing contrast and glare at the ceiling plane.


Standard ballast is high-efficiency, CEE (Consortium for Energy Efficiency) qualified, instant start, <10% THD, universal voltage and sound rated A. Suggested lamps are high-lumen, long-life super T8 lamps which contribute to optimizing system performance. Optional program start and step-dim bi-level ballasts are available as well as several ballast factor options to maximize energy savings and to allow the amount of light to be balanced to the application.

Product overview and specifications
Brand Name Lithonia Lighting
Color White
Environment Indoor
Finish Gloss
Light Source Fluorescent
Listings UL
Mounting Type Recessed
Product Type Retrofit Kit
Series 2ES8RT
Shape Rectangular
Voltage Rating 347
Spec Sheets
A summary of the performance and other technical characteristics of the product.
File Type Document Title View
2ES8RT-2X2_PDF View
2ES8RT-2X4_PDF View
Technical Files
Installation documents, building information models, etc.
File Type Document Title View
2RTLEDR_Installation_Instructions_pdf View
ES8R-instructions_pdf View
RT5R-instructions_pdf View
RT8RT_RT5RT_Installation_Instructions_pdf View
File Type Document Title View
Control-Options_pdf View
EL-Options_pdf View
Download brochures, sell sheets, photometry files and other sales tools.
File Type Document Title View
Relight-FAQs_pdf View
rt-brochure_pdf View