RT5 Volumetric Recessed Lighting

The RT5™ Series is designed for applications where comfort, aesthetics and energy savings are important. With volumetric lighting, this product is ideal for offices, schools, hospitals, retail and numerous other commercial applications.


Two-lamp RT5™ luminaire provides 33% energy savings when compared to a common three-lamp T8 system.

Low profile 3-1/8” depth makes the RT5™ fixture ideal for applications where plenum height is a factor.

Two-piece refractor system uses the combination of diffusing optical film and precisely extruded prisms to efficiently diffuse light.

Reflector includes micro-facets that echo the frequency of the prisms in the refractor, providing a quiet appearance in the ceiling.

Available in a number of ballast configurations including set light output or step level dimming.

Versions available: Recessed and surface mount versions of 2'x4', 2'x 2', 1'x4' plus heat removal (CAS) recessed, and 6" Narrow RT5.

Sloped endplates provide a balanced fixture-to-ceiling ratio while enhancing the perception of fixture height. Ballast/lamp ballast efficacy of F28T5 is 100+ LPW.

Side-mounted ballast tray accessed by removing adjacent ceiling tile.


Step-dimming options (available on some units) allow the system to be switched to 50% power for compliance with common energy codes while illuminating both lamps.

Product overview and specifications
Brand Name Lithonia Lighting
Color White
Color Rendering Index 80
Correlated Color Temperature 3000 K, 3500 K, 4100 K, 5000 K, 6500 K
Environment Indoor
Finish Gloss
Light Source Fluorescent
Listings CA Title 20, CSA, NOM
Mounting Type Recessed, Surface
Product Type Troffer
Series 2RT5, 2RT5S, 2RT5SLSTA, 2RT5SX, RT5, RT5B, RT5BX, RT5N, TRT5N
Shape Rectangular
Voltage Rating 120, 277, 347, MVOLT
Spec Sheets
A summary of the performance and other technical characteristics of the product.
File Type Document Title View
2RT5-2x2_pdf View
2RT5-2x2-CAS_pdf View
2RT5-2X4_PDF View
2RT5-2X4-CAS_PDF View
2RT5S_2X4_pdf View
2RT5S-2X2_PDF View
2RT5S-2X4_PDF View
RT5-1X4_PDF View
RT5B-1X4_PDF View
RT5BX-1X4_PDF View
Technical Files
Installation documents, building information models, etc.
File Type Document Title View
Ballast-Tray-Access_pdf View
BXX-2RT5-Recessed-Mount-Instruction_pdf View
Field-Installation-of-Inverters_pdf View
Flange-DGA-Ceiling-Mount_pdf View
Integral-Tee-Bar-Clip_pdf View
Refractor-Removal_pdf View
Screw-Slot-Ceiling-Detail_pdf View
Surface-Mount-Instruction_pdf View
File Type Document Title View
LIRW-Dimming-Controller_pdf View
File Type Document Title View
Acrylic-Polycarbonate-Compatibility_pdf View
File Type Document Title View
Line-Art-for-RT5_pdf View
Line-Art-of-RT5-2x4_pdf View
This is the Section Header component
File Type Document Title View
Great-Ideas-Ad_pdf View
Look-Good-Ad_pdf View
RT5_Brochure_pdf View
RT5B-FAQs_pdf View
RT5B-RT8B-FAQs_pdf View
RT5-FAQs_pdf View
RT5-Logo-Premuims_pdf View
RT5N-FAQs_pdf View