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WAC Lighting R4FSD FQ 4" Square LED Downlight Trim, Die-Cast Aluminum
The WAC Lighting R4FSD is part of the FQ Recessed series, a 4" square LED downlight trim with integrated light engine built for high-performance, glare-controlled illumination. Constructed from durable die-cast aluminum, this trim features a 30° shielding angle for superior visual comfort along with 45° vertical tilting and 360° horizontal rotation for precise aiming. Rated ETL and cETL for Wet locations and Energy Star qualified, it is engineered for both residential and commercial recessed lighting applications where reliable, code-compliant performance is required.
Key Features
- 4" Square Format: Compact FQ Recessed trim sized for standard 4" housings, suited to tight ceiling layouts.
- Durable Construction: Two-piece die-cast aluminum body for long-term structural integrity and heat dissipation.
- Spring-Mounted Light Engine: The LED light engine mounts to the trim on springs, allowing easy replacement without disturbing the housing.
- 30° Shielding Design: Delivers excellent glare control and visual comfort in occupied spaces.
- Field-Changeable Beam Angle: Reflectors are provided so installers can adjust beam spread on site.
- Operating Temperature Range: Rated from -4°F to 104°F (-20°C to 40°C) for stable performance across varied environments.
- Wet Location Rated: ETL and cETL listed for Wet locations, supporting covered outdoor and bath/shower-adjacent installs.
Certifications & Compliance
- ETL & cETL Rated for Wet Locations
- Energy Star Qualified
- Title 24 Compliant
- Title 20 Compliant
Technical Specifications
- Bulb Base: LED Module - Universal Driver
- Bulb Shape: LED Module
- Bulbs Included: Yes
- Collection: FQ
- Dimmable: 0-10V;ELV;TRIAC
- Hardwired or Portable: Hardwired
- Product Type: Recessed Trims
- Safety Rating: ETL;cETL
- Warranty: 5 Years Functional, 2 Years Finish
- Subcategory: 4" LED
- Avg Rated Hours: 50000
- CRI: 90
- Voltage: 120-240-277
- Material: Die-cast Aluminum
- Country of Origin: China
- Location Rating: Wet
- Style: Modern; Transitional
Typical Applications
- Residential and Commercial Recessed Ceiling Lighting
- Wet-Location Areas Including Covered Outdoor and Bath Spaces
- Floor-to-Ceiling Wall Washing
- New Construction and Remodel Lighting Layouts
- Modern and Transitional Interior Design Schemes
Why WAC Lighting?
WAC Lighting builds the FQ Recessed series around two-piece die-cast aluminum construction, a spring-mounted serviceable light engine, and 30° shielding for glare control, giving installers a durable, field-adjustable downlight trim. With ETL and cETL Wet location listing plus Energy Star, Title 24, and Title 20 compliance, the R4FSD delivers reliable, code-compliant performance for professional lighting projects.
Manufacturer Resources
Specification Sheet
Product Specs
- Bulb Base:
- LED Module - Universal Driver
- Bulb Shape:
- LED Module
- Bulbs Included:
- Yes
- Collection:
- FQ
- Dimmable:
- 0-10V;ELV;TRIAC
- Hardwired or Portable:
- Hardwired
- Product Type:
- Recessed Trims
- Safety Rating:
- ETL;cETL
- Subcategory:
- 4" LED
- Avg Rated Hours:
- 50000
- CRI:
- 90
- Product Voltage:
- 120-240-277
- Product Material:
- Die-cast Aluminum
- Location Rating:
- Wet
- Product Style:
- Modern; Transitional
- Department:
- Electrical
WAC Lighting R4FSDL-927-BK – Frequently Asked Questions
1) Can the WAC Lighting R4FSD 4 inch square downlight trim be used in a shower or under a covered exterior soffit?
Yes. The R4FSD trim is ETL and cETL listed for Wet locations, which covers covered outdoor ceilings and bath or shower-adjacent positions. It also holds an operating range of -4F to 104F (-20C to 40C), so an unconditioned covered porch is within spec.
2) What dimmer will work with the WAC FQ R4FSD LED downlight trim?
The R4FSD accepts 0-10V, ELV, and TRIAC dimming, so it drops into either a line-voltage residential dimmer (TRIAC or ELV) or a 0-10V commercial control system. It is a hardwired fixture with an integrated LED module on a universal driver, operating at 120, 240, or 277 volts, so the same trim suits both a house and a 277V commercial lighting branch.
3) Do I need a separate bulb or LED module for the WAC R4FSD trim?
No separate lamp is needed. The R4FSD ships with the integrated LED module included, rated 50,000 average hours. The engine mounts to the trim on springs, so if it ever needs service you pull and replace the engine without touching the housing or the ceiling opening.
4) Will the R4FSD trim pass California Title 24 on a new residential job?
Yes. The FQ series R4FSD is Energy Star qualified and compliant with both Title 24 and Title 20, which is what a California inspector looks for on recessed residential lighting. It is also a 90 CRI source, which matters because Title 24 sets a minimum CRI for high-efficacy residential luminaires.
5) Can I aim this square downlight to wall wash, or is it fixed straight down?
It is adjustable. The R4FSD light engine tilts 45 degrees vertically and rotates 360 degrees horizontally, so you can pull the beam off nadir to graze a wall or hit artwork. Reflectors are supplied with the trim so the beam spread can be changed in the field, and the 30 degree shielding angle keeps the source out of sight line once it is aimed.
6) Which color temperature should I specify on the WAC FQ square downlight, and what is the 3000-1800 option?
Five choices: 2700K, 3000K, 3500K, 4000K, and a 3000-1800 warm-dim option that shifts from 3000K down toward 1800K as you dim it, which is the one to pick for hospitality and residential spaces where you want candlelight warmth at low levels. All of them run at 90 CRI, so color rendering stays consistent if you mix temperatures between rooms.
7) Is a die-cast aluminum trim worth it over a stamped or plastic recessed trim for a commercial job?
For commercial and wet-location work, yes. The R4FSD uses a two-piece die-cast aluminum body, which holds its shape over repeated relamping and aiming and pulls heat away from the LED engine, where a plastic trim relies on the housing for everything. Aluminum is also what lets the trim carry the Wet location listing on a covered exterior ceiling.
8) I need the recessed trims across a building to match. What finishes does the WAC R4FSD square trim come in?
Four core finishes across the range: White, Black, Dark Bronze, and Haze. The 5.5 build adds a two-tone Haze/White. White and Black are the usual choices for blending into a painted ceiling, Dark Bronze for exterior soffits, and Haze for a low-glare metallic aperture. Every finish is available in all five color temperatures.
How fast can I get the WAC Lighting R4FSDL-927-BK delivered?
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Can I return it if it doesn’t work for me?
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Does the WAC Lighting R4FSDL-927-BK come with a warranty?
Absolutely. The WAC Lighting R4FSDL-927-BK is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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