RAB SWISH34-1X4 Field-Adjustable LED Troffer — 30W / 25W / 18W Selectable

The RAB SWISH34-1X4 is a 1×4 field-adjustable LED troffer delivering up to 4,109 lumens at 30W and a peak efficacy of 149.2 lm/W at the 18W setting. Wattage is field-selectable at 30W, 25W, or 18W (factory default: 30W); 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-6GLFQT). Replaces up to 2-lamp T8 fluorescent fixtures. Rated for 100,000 hours (IES LM-80 + TM-21).

Key Features

• Field-Selectable Wattage: Switch between 30W, 25W, and 18W in the field without tools — factory default is 30W, 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 maintained to ANSI C78.377-2017 across all CCT settings.
• Maximum Lumen Output: Delivers up to 4,109 lumens at 30W / 5000K — ideal for 1×4 T-grid layouts in offices, corridors, and retail environments.
• Peak Efficacy: Achieves 149.2 lm/W at 18W / 4000K — among the highest efficacy ratings in the 1×4 troffer category.
• CRI: CRI 85–87 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.
• 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-6GLFQT) · 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 SWISH34-1X4 delivers the following verified output across all wattage and CCT combinations:

At 30W: 3,930 lm (3500K / 135.5 lm/W) · 4,104 lm (4000K / 146.3 lm/W) · 4,109 lm (5000K / 140.9 lm/W)
At 25W: 3,447 lm (3500K / 138.1 lm/W) · 3,568 lm (4000K / 147.7 lm/W) · 3,576 lm (5000K / 142.7 lm/W)
At 18W: 2,538 lm (3500K / 141.7 lm/W) · 2,607 lm (4000K / 149.2 lm/W) · 2,639 lm (5000K / 146.6 lm/W)

CRI: 85–87 across all settings. Peak efficacy: 149.2 lm/W at 18W / 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 (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 SWISH34-1X4 uses an isolated, Class 2 constant-current driver operating on 120–277V AC, 50/60Hz. Input watts at factory default (30W setting): 29.00W (3500K) · 28.06W (4000K) · 29.17W (5000K). Surge protection: L-N 2.5KV / LN-GND 2.5KV. 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 SWISH34-1X4 features a sheet metal housing with a polycarbonate lens and a center basket design optimized for uniform light distribution across the 1×4 aperture. Finish is formulated for high durability and long-lasting color. Suitable for direct contact with insulation. Compatible with standard 1×4 T-grid ceiling openings.

Installation & Mounting

The SWISH34-1X4 recesses directly into a standard 1×4 T-grid ceiling. No additional hardware required for recessed installation. For surface mounting, the optional SMKEZPAN1X4 surface mounting kit (White) is available separately. Emergency battery backup models (/E suffix) are available.

Optional mounting accessories (ordered separately):

• Surface Mounting Kit 1×4: SMKEZPAN1X4
• 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-6GLFQT. To verify rebate eligibility and locate participating utilities, search product code S-6GLFQT at designlights.org.

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

Typical Applications

• Corridors & Hallways: 1×4 form factor fits narrow T-grid runs; 18W setting (2,607 lm) delivers efficient ambient lighting without over-illuminating low-traffic zones.
• Open Offices: Peak efficacy of 149.2 lm/W at 18W reduces energy costs while maintaining comfortable task illumination at standard 9–10 ft ceiling heights.
• Classrooms & Conference Rooms: Field-adjustable CCT (3500K–5000K) allows tuning to activity type — warm for collaborative settings, cool for focused tasks — without fixture replacement.
• Healthcare & Medical Offices: CRI 85–87 and ANSI C78.377-2017 color consistency support accurate visual assessment in exam and treatment rooms.
• Schools & Government Buildings: DLC Premium certification (S-6GLFQT) maximizes rebate returns from DLC Member Utilities, reducing payback period on large-scale 1×4 retrofits.
• Unconditioned Spaces: Cold weather start rating of −40°C (−40°F) makes the SWISH34-1X4 suitable for unheated storage areas and mechanical rooms with 1×4 grid ceilings.

What’s Included

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