RAB SWISH1X4/E LED Center Basket Troffer — 35W / 26W / 18W Selectable — Battery Backup — White

The RAB SWISH1X4/E is a 1×4 recessed LED center basket troffer with integrated 90-minute emergency battery backup, designed for commercial interiors requiring life-safety code compliance. Wattage is field-selectable between 35W (factory default), 26W, and 18W, and CCT is field-selectable between 3500K, 4000K (factory default), and 5000K — no tools required. At peak output, the fixture delivers 4,923 lumens at 35W / 4000K and operates on 120–277V with a 0–10V dimming driver. The SWISH1X4/E is UL Listed for dry and damp locations and is DLC 5.1 Listed as Ultra-Efficient Premium. Replaces conventional fluorescent 1×4 troffer fixtures.

Key Features

• Selectable Wattage: 35W / 26W / 18W — field-adjustable via built-in onboard switch, factory default 35W. No tools required.
• Wattage Equivalency: Replaces conventional fluorescent 1×4 troffer fixtures.
• Maximum Lumen Output: 4,923 lm at 35W / 4000K.
• Peak Efficacy: 153.0 lm/W at 26W / 4000K.
• CRI: 82–84 across all wattage and CCT configurations.
• Selectable CCT: 3500K / 4000K / 5000K — field-adjustable via built-in onboard switch, factory default 4000K. No tools required.
• Lens & Optics: Diffused polystyrene lens panel for uniform, glare-controlled light distribution across the 1×4 grid opening.
• Dimming: 0–10V dimming driver — dims to 10% minimum.
• Voltage & Driver: Class 2 constant current, 120–277V, 50/60Hz.
• Location Rating: UL Listed for dry and damp locations.
• Operating Temperature: −4°F (−20°C) minimum (standard) · 41°F (5°C) minimum (with battery backup) · 104°F (40°C) maximum ambient.
• Certifications: UL Listed (dry and damp) · DLC 5.1 Ultra-Efficient Premium.
• Rated Life: 100,000 hours per IES LM-80 / TM-21.
• Warranty: 5-year RAB warranty — covers light output, color stability, driver performance, and fixture finish.
• Battery Backup: 90-minute emergency operation on power failure · wired 120–277V · Battery Backup Light Loss Factor: 0.23 · minimum starting temperature 41°F (5°C).

Performance & Light Output

At 35W: 4,715 lm (3500K / 137.3 lm/W), 4,923 lm (4000K / 146.9 lm/W), 4,887 lm (5000K / 141.6 lm/W). At 26W: 3,589 lm (3500K / 142.5 lm/W), 3,716 lm (4000K / 150.7 lm/W), 3,719 lm (5000K / 147.0 lm/W). At 18W: 2,455 lm (3500K / 145.0 lm/W), 2,559 lm (4000K / 153.0 lm/W), 2,584 lm (5000K / 151.1 lm/W).

CRI 82–84 across all wattage and CCT settings. Rated life 100,000 hours (L70) per IES LM-80 / TM-21.

Smart & Control Features

The SWISH1X4/E supports 0–10V dimming as standard and is available with four factory-installed occupancy sensor configurations:

• Standard (0–10V): Dims to 10% minimum via 0–10V DC circuit — compatible with standard commercial building controls.
• PIR (/PIR suffix): Factory-installed Passive Infrared sensor. Detection range: 20 ft diameter at 9 ft mounting height. Max mounting height: 9–12 ft.
• Microwave (/MVS suffix): Factory-installed microwave sensor. Detection range: 20 ft diameter at 9 ft mounting height. Max mounting height: 9–12 ft.
• Lightcloud Blue PIR (/LCBS suffix): Wireless Bluetooth mesh PIR sensor — no 0–10V circuit required.
• Lightcloud Blue MVS (/LCB-MVS suffix): Wireless Bluetooth mesh microwave sensor — no 0–10V circuit required.

Sensor defaults: Motion Sensitivity High · 100% brightness when triggered · 20-min hold time · 20% standby dim · 1-min standby time · Daylight Disabled. Adjustable via Lightcloud Blue app (Lightcloud Blue models) or MSR1 remote accessory (sold separately).

Electrical

Class 2 constant current driver. Input: 120–277V, 50/60Hz. Power Factor: 99.6% at 120V / 95.1% at 277V. THD: 6.6% at 120V / 12.5% at 277V. Surge protection: 2kV L-L / 2kV L-N-G. Dimming: 0–10V, dims to 10% minimum. Battery backup: 90-minute emergency operation · wired 120–277V · BLLF: 0.23 · minimum starting temperature 41°F (5°C) · maximum ambient 104°F (40°C). Mercury-free, UV-free, RoHS compliant.

Construction

Housing & Thermal: Cold Rolled Carbon Steel Sheets and Strip (SPCC) housing construction.

Lens & Optics: Diffused polystyrene lens panel for uniform, glare-controlled illumination across the full 1×4 grid opening.

Finish: White — formulated for high durability and long-lasting color.

Environmental & Safety: UL Listed for dry and damp locations. Mercury-free, UV-free, RoHS compliant. Operating range: −4°F (−20°C) to 104°F (40°C) standard; 41°F (5°C) minimum for battery backup models.

Dimensions & Weight: Ceiling opening: 42¹¹⁄₁₆" × 11¹⁵⁄₁₆". Fixture depth: 1⁷⁄₁₆". Weight: 10 lbs.

Installation & Mounting

Standard Hardware: Mounting hardware included for recessed T-grid ceiling installation.

Mounting Options: Recessed into standard 1×4 T-grid ceiling systems.

Wiring: An unswitched hot line must be connected to maintain battery charge. Wattage and CCT selections should be confirmed prior to installation. Minimum starting temperature with battery backup: 41°F (5°C).

Certifications & Rebates

• UL Listed — dry and damp locations
• DLC 5.1 Ultra-Efficient Premium — qualifies for the highest tier of utility rebate programs from DLC Member Utilities. To verify rebate eligibility with your utility provider, visit designlights.org and search catalog number S-RV80FX.
• TAA Compliant — eligible for U.S. government and GSA procurement
• RoHS Compliant — mercury-free, UV-free

Typical Applications

• Commercial egress corridors and stairwells — 90-minute battery backup maintains illumination on emergency evacuation routes per life-safety codes
• Healthcare facilities and exam rooms — damp location rating and 82–84 CRI support reliable clinical illumination during power events
• Educational institutions — selectable wattage and emergency operation meet both energy and safety code requirements
• Government and institutional buildings — TAA Compliant and DLC 5.1 Ultra-Efficient Premium qualify for GSA procurement and highest-tier utility rebates
• Retail and office interiors — selectable 3500K–5000K CCT adapts to varied task environments while providing emergency coverage

What's Included

• RAB SWISH1X4/E LED Center Basket Troffer — White
• Integrated 90-minute emergency battery backup unit
• Mounting hardware for recessed T-grid installation