The RAB SWISH34-2X4/E is a 2×4 field-adjustable LED troffer with integrated emergency battery backup, 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 (DLC ID: S-518PBF). The integrated /E battery backup provides 90-minute emergency illumination at reduced output upon loss of AC power, meeting Life Safety Code requirements. Replaces up to 2-lamp T8 fluorescent fixtures. Rated for 100,000 hours (IES LM-80 + TM-21).

Key Features

• Integrated Emergency Battery Backup: Built-in /E battery module provides 90 minutes of emergency illumination at reduced output upon AC power loss — meets Life Safety Code and IBC/IFC egress lighting requirements without a separate emergency unit.
• Field-Selectable Wattage: Switch between 40W, 35W, and 30W in the field without tools — factory default is 40W.
• Field-Selectable CCT: Choose 3500K, 4000K, or 5000K at installation (factory default: 4000K); color consistency maintained to ANSI C78.377-2017.
• Maximum Lumen Output: Delivers up to 5,509 lumens at 40W / 4000K — suitable for 2×4 T-grid layouts in large offices, corridors, and egress paths.
• Peak Efficacy: Achieves 145.0 lm/W at 30W / 4000K.
• CRI: CRI 84–85 across all wattage and CCT combinations.
• Color Uniformity: Meets ANSI C78.377-2017 for chromaticity of solid-state lighting products.
• 0–10V Dimming: Dims smoothly from 100% down to 10% with any standard 0–10V dimmer; compatible with Lightcloud Blue and Lightcloud Enterprise control systems.
• Voltage & Driver: Isolated, Class 2 constant-current driver; 120–277V, 50/60Hz; surge protection L-N 2.5KV / LN-GND 2.5KV.
• Location Rating: UL Listed for dry and damp locations; suitable for direct contact with insulation.
• Cold Weather Start: Battery backup models rated to 0°C (32°F) cold weather start.
• Maximum Ambient Temperature: Rated for up to 50°C (122°F) for /E 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 2-lamp T8 fluorescent fixtures.

Performance & Light Output

The SWISH34-2X4/E 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: 84–85 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. 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 (SKU: MSR1, IP20). 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/E 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. Emergency battery module activates automatically upon AC power loss and sustains illumination for 90 minutes at reduced output. Cold weather start: 0°C (32°F); maximum ambient: 50°C (122°F). Green technology: mercury-free, UV-free, RoHS-compliant.

Construction

The SWISH34-2X4/E features a sheet metal housing with a polycarbonate lens and integrated emergency battery module. Center basket design for uniform light distribution across the 2×4 aperture. Suitable for direct contact with insulation. Compatible with standard 2×4 T-grid ceiling openings.

Installation & Mounting

Recesses directly into a standard 2×4 T-grid ceiling. For surface mounting, the optional SMKEZPAN2X4 kit is available separately. For standard (non-emergency) models or other grid sizes, see the SWISH34-2X4, SWISH34-2X2, and SWISH34-1X4.

• Surface Mounting Kit 2×4: SMKEZPAN2X4
• Multi-Sensor Remote Control: MSR1 (IP20)

Certifications & Rebates

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

DLC Premium — DLC ID: S-518PBF. Search S-518PBF at designlights.org to verify rebate eligibility and locate participating utilities.

RoHS Compliant — Mercury-free and UV-free.

Typical Applications

• Egress Corridors & Open Areas: 90-minute emergency backup satisfies Life Safety Code egress requirements in 2×4 grid bays without a separate emergency unit.
• Open Offices & Lobbies: 5,509 lm covers large 2×4 bays with DLC Premium efficiency and built-in egress compliance.
• Classrooms & Conference Rooms: Selectable CCT and wattage meet varied needs while maintaining egress compliance.
• Healthcare Facilities: CRI 84–85 and emergency backup support clinical task lighting and life safety in a single fixture.
• Schools & Government Buildings: DLC Premium (S-518PBF) maximizes rebates while /E eliminates dedicated emergency luminaires on egress paths.
• Retail & Mixed-Use Spaces: Combines general illumination and egress lighting in one 2×4 troffer footprint.

What’s Included

• 1× RAB SWISH34-2X4/E LED Troffer with Emergency Battery Backup (White)
• Mounting hardware for recessed T-grid installation