Product Description
LITHONIA LO4AR-TRW-LSS-TRIM is a 4" round clear aluminum reflector with a white painted flange (TRW) and a semi-specular (LSS) finish, engineered for the LDN4 downlight family. It delivers crisp, comfortable illumination with excellent cutoff while preserving a clean, architectural look for offices, corridors, lobbies, hospitality spaces, and retail environments.
Model: LO4AR-TRW-LSS-TRIM
Brand: Lithonia Lighting
Series Compatibility: LDN4 4" Open New-Construction Downlight
Reflector: Clear (AR) aluminum
Finish: Semi-specular (LSS)
Flange: White painted (TRW)
Cutoff: Up to 55° source cutoff with diffusing lensed optic
Free shipping on orders over $250
Product Benefits
- Comfortable, glare-controlled output thanks to the semi-specular clear reflector and deep optical design.
- Clean ceiling aesthetic with a white painted flange that blends with common ceiling finishes.
- Optimized for LDN4 engines to maintain consistent color, distribution, and trim retention.
- Durable aluminum construction with long-lasting optical performance and easy maintenance.
Key Features
- Form Factor: 4" round downlight reflector & flange
- Reflector Code: AR (Clear), Finish: LSS (Semi-specular)
- Flange Option: TRW (White painted)
- Trim Retention: Torsion springs for secure fit
- Applications: Corridors, lobbies, conference rooms, private offices, hospitality, retail
Enhanced Specifications
| Technical Specs | |
|---|---|
| Series Compatibility | LDN4 4" Open Non-IC New Construction Downlight |
| Reflector Material | Spun aluminum, clear (AR) |
| Optical Finish | Semi-specular (LSS) |
| Flange | White painted (TRW) |
| Trim Retention | Torsion springs |
| Physical Specs | |
|---|---|
| Aperture | Approximately 4-5/16" |
| Ceiling Opening | Approximately 5-1/8" |
| Overlap Trim (OD) | Approximately 5-7/16" |
| Max Ceiling Thickness | Up to 1-1/2" (per housing) |
| Performance Specs | |
|---|---|
| Cutoff | Nominal 55° to source/source image |
| Lumen Multiplier (LSS) | ~0.95 vs. specular clear (typical for LDN4 trims) |
| Listings (with housing) | Damp location standard; wet location covered ceiling optional |
| Warranty | 5-year limited (with complete LDN4 luminaire) |
Application Examples
- Modern office corridors and private offices needing uniform, comfortable illumination
- Hospitality lobbies and guest corridors seeking premium, low-glare appearance
- Retail aisles and fitting areas where clean vertical and general light are desired
- Healthcare and education common areas with architectural ceilings
Installation Tips
- Cut a 4-3/4" ceiling opening for the 4" variant and set the frame flush to the ceiling line.
- Complete line-voltage wiring in the junction box and secure covers before installing the light engine.
- Seat the reflector/trim using the torsion springs; rotate until the trim slot aligns, then fasten the provided screw.
- For T-bar ceilings, secure channel bars to the grid and re-tighten vertical and clamping hardware after adjustment.
- Observe all safety instructions: de-energize circuit, use 90°C-rated conductors, and keep insulation clear of the housing.
Frequently Asked Questions
Q: Which luminaires does this trim fit?
A: It is designed for the Lithonia LDN4 4" open new-construction downlight family.
Q: What does “LSS semi-specular” mean?
A: It’s a soft-sheen reflective finish that reduces glare versus full specular while preserving high efficiency.
Q: What is the advantage of the TRW white flange?
A: The white painted flange blends with acoustic tiles and gypsum ceilings for a clean, minimal reveal.
Q: Does the trim affect lumen output?
A: Semi-specular (LSS) typically provides about 95% of the output of a full specular clear reflector, with improved visual comfort.
Q: Is this trim suitable for wet locations?
A: When paired with the appropriate LDN4 housing options, the system is damp-location rated (wet location available for covered ceilings).
Q: How is the trim retained?
A: Torsion springs engage the mounting brackets for a secure, rattle-free fit and easy service.
