RAB SWISH34-2X4 Field-Adjustable LED Troffer — 40W / 35W / 30W Selectable

The RAB SWISH34-2X4 is a 2×4 field-adjustable LED troffer delivering up to 5,509 lumens at 40W and a peak efficacy of 145.0 lm/W at the 30W setting. Wattage is field-selectable at 40W, 35W, or 30W (factory default: 40W); color temperature is field-selectable at 3500K, 4000K, or 5000K (factory default: 4000K). The fixture operates on 120–277V with a constant-current, isolated Class 2 driver and supports 0–10V dimming down to 10%. UL Listed for dry and damp locations. Listed as DLC Premium under DLC 5.1, qualifying for the highest tier of utility rebates from DLC Member Utilities (DLC ID: S-518PBF). Replaces up to 4-lamp T8 fluorescent fixtures. Rated for 100,000 hours (IES LM-80 + TM-21).

Key Features

• Field-Selectable Wattage: Switch between 40W, 35W, and 30W in the field without tools — factory default is 40W, allowing job-site flexibility across varying ceiling heights and lumen targets.
• Field-Selectable CCT: Choose 3500K, 4000K, or 5000K at installation (factory default: 4000K); color consistency is maintained to ANSI C78.377-2017 across all CCT settings.
• Maximum Lumen Output: Delivers up to 5,509 lumens at 40W / 4000K — suitable for open offices, classrooms, and retail environments requiring high ambient light levels.
• Peak Efficacy: Achieves 145.0 lm/W at 30W / 4000K, making the SWISH34-2X4 among the highest-efficacy 2×4 troffers in its class.
• CRI: CRI 85 across all wattage and CCT combinations — consistent color rendering for occupant comfort and task accuracy.
• Color Uniformity: Meets ANSI C78.377-2017 for chromaticity of solid-state lighting products — eliminates color shift between units on the same ceiling grid.
• 0–10V Dimming: Dims smoothly from 100% down to 10% with any standard 0–10V dimmer; compatible with Lightcloud Blue wireless mesh and Lightcloud Enterprise (Zigbee) control systems.
• Voltage & Driver: Isolated, Class 2 constant-current driver; 120–277V, 50/60Hz; surge protection L-N 2.5KV / LN-GND 2.5KV; THD 6.2% (120V) / 4.5% (277V); power factor 99.6% (120V) / 94.4% (277V).
• Location Rating: UL Listed for dry and damp locations; suitable for direct contact with insulation.
• Cold Weather Start: Operates in temperatures as low as −40°C (−40°F) — suitable for unconditioned spaces; battery backup models rated to 0°C (32°F).
• Maximum Ambient Temperature: Rated for up to 40°C (104°F) standard; up to 50°C (122°F) for battery backup models.
• Certifications: UL Listed · DLC Premium (S-518PBF) · RoHS-compliant · Suitable for direct insulation contact.
• Rated Life & Warranty: 100,000-hour rated life (IES LM-80 + TM-21); covered by RAB’s 5-year limited warranty on light output, driver, and paint finish.
• Wattage Equivalency: Replaces up to 4-lamp T8 fluorescent fixtures.

Performance & Light Output

The SWISH34-2X4 delivers the following verified output across all wattage and CCT combinations:

At 40W: 5,208 lm (3500K / 130.3 lm/W) · 5,509 lm (4000K / 140.5 lm/W) · 5,387 lm (5000K / 135.1 lm/W)
At 35W: 4,650 lm (3500K / 133.3 lm/W) · 4,875 lm (4000K / 142.8 lm/W) · 4,808 lm (5000K / 138.2 lm/W)
At 30W: 4,140 lm (3500K / 137.5 lm/W) · 4,310 lm (4000K / 145.0 lm/W) · 4,269 lm (5000K / 142.1 lm/W)

CRI: 85 across all settings. Peak efficacy: 145.0 lm/W at 30W / 4000K. Rated life: 100,000 hours per IES LM-80 tested and TM-21 projected L70 lumen maintenance.

Smart & Control Features

Available with optional wireless mesh control and occupancy sensing; configure at order using the suffix codes below. Standard 0–10V dimming (10–100%) is included on all models.

• Lightcloud Blue (/LCBS suffix): Bluetooth mesh — no gateway required; control via smartphone or the MSR1 remote. Supports PIR (/LCBS/PIR) and Microwave occupancy sensors (/LCBS/MVS).
• Lightcloud Enterprise (/LC suffix): Zigbee mesh — requires gateway; enterprise-scale building management integration.
• PIR Occupancy Sensor (/PIR suffix): Passive infrared sensor; recommended mounting height 9–12 ft; operating range −22°F to 104°F; 12VDC.
• Microwave Occupancy Sensor (/MVS suffix): Active microwave sensor; recommended mounting height 9–12 ft; operating range −22°F to 104°F; 12VDC.
• MSR1 Remote (SKU: MSR1): Multi-sensor remote control for field adjustment of sensor settings; IP20.

Electrical

The SWISH34-2X4 uses an isolated, Class 2 constant-current driver operating on 120–277V AC, 50/60Hz. Input watts at factory default (40W setting): 39.96W (3500K) · 39.20W (4000K) · 39.87W (5000K). Surge protection: L-N 2.5KV / LN-GND 2.5KV. Total harmonic distortion (THD): 6.2% at 120V · 4.5% at 277V. Power factor: 99.6% at 120V · 94.4% at 277V. Green technology: mercury-free, UV-free, RoHS-compliant components throughout. Emergency battery backup versions (/E suffix) are available; cold weather start on battery backup models is limited to 0°C (32°F) with maximum ambient of 50°C (122°F).

Construction

The SWISH34-2X4 features a sheet metal housing with a polycarbonate lens and a center basket design optimized for uniform light distribution across the 2×4 aperture. Finish is formulated for high durability and long-lasting color. Suitable for direct contact with insulation. Weight: 8.6 lbs (9.5 lbs for battery backup models). Dimensions: 47¾" L × 23¾" W × 1⅝" H.

Installation & Mounting

The SWISH34-2X4 recesses directly into a standard T-grid ceiling. No additional hardware required for recessed installation. For surface mounting, the optional SMKEZPAN2X4 surface mounting kit (White) is available separately. Emergency battery backup models (/E suffix) are available and increase fixture weight to 9.5 lbs.

Optional mounting accessories (ordered separately):

• Surface Mounting Kit 2×4: SMKEZPAN2X4
• Multi-Sensor Remote Control: MSR1 (IP20)
• Emergency Battery Backup: /E suffix models

Certifications & Rebates

UL Listed — Suitable for dry and damp locations. Suitable for direct contact with insulation.

DLC Premium — Listed on the DesignLights Consortium Qualified Products List (QPL) as a DLC Premium product under DLC 5.1, qualifying for the highest tier of utility rebates from DLC Member Utilities. DLC ID: S-518PBF. To verify rebate eligibility and locate participating utilities, search product code S-518PBF at designlights.org.

RoHS Compliant — All components meet RoHS standards; mercury-free and UV-free.

Typical Applications

• Open Offices: High efficacy at lower wattage settings reduces energy costs while maintaining comfortable 350–500 fc illumination for task work.
• Classrooms & Conference Rooms: Field-adjustable CCT allows tuning from 3500K (warm, relaxed) to 5000K (alert, focused) to match activity type without fixture replacement.
• Healthcare & Medical Offices: CRI 85 and ANSI C78.377-2017 color consistency support accurate visual assessment in exam and treatment rooms.
• Retail & Showrooms: Selectable CCT and high lumen output (up to 5,509 lm) enhance merchandise presentation in T-grid ceiling environments.
• Schools & Government Buildings: DLC Premium certification (S-518PBF) maximizes rebate returns from DLC Member Utilities, reducing payback period on large-scale retrofits.
• Unconditioned Spaces: Cold weather start rating of −40°C (−40°F) makes the SWISH34-2X4 suitable for unheated storage, warehouse offices, and mechanical rooms.

What’s Included

• 1× RAB SWISH34-2X4 LED Troffer (White)
• Mounting hardware for recessed T-grid installation