RAB T17FA-2X4 Field-Adjustable 2x4 Back-Lit LED Flat Panel — 50W/40W/30W Selectable — 3500K/4000K/5000K — White

The RAB T17FA-2X4 is a commercial 2x4 T17FA Economy Field-Adjustable Back-Lit LED Flat Panel engineered to deliver up to 6,521 lumens with field-adjustable 50W/40W/30W power settings and switchable 3500K/4000K/5000K color temperatures. Operating on universal 120–277V electrical systems with 0–10V continuous dimming (10%–100%), this high-efficacy luminaire replaces legacy 2x4 linear fluorescent ceiling troffers. Built with a UL Listed damp location, IC-Rated, and IP20 construction, it is qualified for commercial utility rebates on the DLC Qualified Products List (DLC ID: S-GVLCC7) and features back-lit optical architecture with an aluminum frame, cold-rolled steel back housing, and powder-coated sheet metal reflector, a frosted polystyrene lens, CCEA Chicago plenum compliance, and recessed T-grid or optional surface/drywall mounting (SMKEZPAN2X4 / RMKPANEL2X4).

Key Features

• Selectable Wattage: 50W / 40W / 30W — field-adjustable via onboard switch (factory default 50W)
• Maximum Lumen Output: 6,521 lm at 50W (4000K)
• Peak Efficacy: 147.3 lm/W for high-efficiency commercial operation
• CRI: 83–84 CRI color rendering across all settings
• Color Consistency: 7-step MacAdam Ellipse binning following ANSI C78.377-2017 solid-state lighting guidelines
• Selectable CCT: 3500K / 4000K / 5000K — field-adjustable via onboard switch (factory default 4000K)
• Lens & Optics: Back-lit optical design with a Frosted Polystyrene (PS) lens and powder-coated sheet metal reflector for uniform illumination
• Dimming: 0–10V continuous dimming standard from 10% to 100%
• Voltage: Universal 120–277V AC, 50/60Hz Class 2, Class P constant current driver
• Location & Ceiling Rating: UL Listed for damp locations; IC-Rated for direct contact with ceiling insulation; IP20 rated; CCEA compliant for environmental air spaces
• Operating Temperature: -4°F (-20°C) to 113°F (45°C) ambient range
• Certifications: DLC Listed, UL Listed, IC-Rated, CCEA Compliant (City of Chicago), IP20, IESNA LM-79 & LM-80 Tested, RoHS Compliant
• Rated Life: 100,000 hours (L70) per IES LM-80 results and TM-21 calculations
• Warranty: 5-year limited warranty covering light output, driver performance, and paint finish — RAB
• Packaging Note: Sold in quantities of 2 units packaged per box

Performance & Light Output

At 50W (Factory Default): 6,080 lm (3500K / 122.6 lm/W / 83 CRI / 49.6W input), 6,521 lm (4000K / 138.7 lm/W / 84 CRI / 47.0W input), 6,193 lm (5000K / 125.6 lm/W / 83 CRI / 49.3W input).

At 40W: 5,201 lm (3500K / 128.1 lm/W / 83 CRI / 40.6W input), 5,540 lm (4000K / 143.2 lm/W / 84 CRI / 38.7W input), 5,301 lm (5000K / 131.5 lm/W / 84 CRI / 40.3W input).

At 30W: 4,031 lm (3500K / 134.8 lm/W / 83 CRI / 29.9W input), 4,243 lm (4000K / 147.3 lm/W / 84 CRI / 28.8W input), 4,103 lm (5000K / 138.1 lm/W / 84 CRI / 29.7W input).

CRI 83–84 across all configurations. Rated life 100,000 hours (L70) per IES LM-80 results and TM-21 calculations.

Smart & Control Features

The T17FA-2X4 includes factory-wired 0–10V dimming control leads for smooth continuous dimming from 10% to 100% on a separate 0–10V DC dimming circuit when paired with compatible commercial 0–10V dimmers or building lighting controls.

Electrical

Powered by a Class 2, Class P constant current driver operating on universal 120–277V AC at 50/60Hz. Delivers high electrical efficiency with a Power Factor of 99.3% at 120V (97.1% at 277V) and Total Harmonic Distortion (THD) of 11.2% at 120V (3.9% at 277V). Integrated 2.5kV ring-wave surge protection safeguards internal electronics against transient voltage spikes. Includes pre-wired 0–10V dimming leads (10%–100% dimming range).

Emergency Battery Backup Options: Factory-configured emergency battery backup models (T17FA-2X4/E) operate the fixture for 90 minutes during power loss with an Emergency Light Loss Factor (LLF) of 0.25 at 50W (~1,630 emergency lumens), 0.28 at 40W (~1,551 emergency lumens), and 0.36 at 30W (~1,527 emergency lumens). Compatible field-installable battery backups (EMB-9, EMB-15, EMB-25) are also available for separate purchase.

Operating current and amp draw across input voltages for branch circuit and breaker loading calculations:

Construction

Housing & Build: Back-lit panel construction featuring a durable aluminum frame, a cold-rolled steel back housing, and a powder-coated sheet metal reflector.

Location & Environmental Rating: UL Listed for indoor damp locations, IC-Rated for direct contact with building insulation, IP20 rated for dust and water ingress protection, and CCEA compliant for use in environmental air spaces per the electrical code specification of the City of Chicago. Mercury and UV free with RoHS-compliant components.

Operating Temperature: Minimum starting temperature of -4°F (-20°C) (32°F / 0°C for /E battery models); operating ambient temperature range of -4°F (-20°C) to 113°F (45°C).

Lens & Optics: Back-lit discrete surface-mount LEDs paired with a Frosted Polystyrene (PS) diffuser engineered for smooth, even architectural light distribution.

Finish: High-durability white finish formulated for long-lasting color stability.

Dimensions & Weight: 47.75" L × 23.75" W × 1.38" H (47 3/4" × 23 3/4" × 1 3/8"). Fixture weight: 7.28 lbs.

Installation & Mounting

Standard Mounting: Recessed directly into standard 2x4 T-grid ceilings with a slim 1.38-inch (1 3/8") back-lit profile. Sold in quantities of 2 units packaged per box.

Surface & Drywall Recessed Mounting: Compatible with optional surface mounting kits and recessed drywall mounting kits ordered separately.

Accessories (Sold Separately):

• Surface Mounting Kit: SMKEZPAN2X4 (EZPAN 2X4 Surface Mounting Kit White, UPC: 019813598178 — sold separately)
• Recessed Drywall Mounting Kit: RMKPANEL2X4 (LPANEL 2X4 Recessed Mounting Kit White, UPC: 019813104980 — sold separately)
• Field-Installable Emergency Battery Backups: EMB-9, EMB-15, and EMB-25 — sold separately

Certifications & Rebates

• DLC Listed: Listed on the DesignLights Consortium (DLC) Qualified Products List and eligible for rebates from DLC Member Utilities. To confirm rebate eligibility with your local utility provider, visit designlights.org and search DLC Product ID S-GVLCC7.
• UL Listed: Certified for indoor damp locations per UL standards.
• IC-Rated: Approved for direct contact with ceiling insulation.
• CCEA Compliant: Meets luminaire requirements for use in Environmental Air Space per the electrical code specification of the City of Chicago.
• IP20 Rated: Ingress protection rating of IP20 for indoor commercial ceiling environments.
• IESNA LM-79 & LM-80 Tested: Luminaire and LED components tested by an independent laboratory per IESNA LM-79 and LM-80 standards.
• RoHS Compliant: Mercury and UV free with RoHS-compliant components.

Typical Applications

• Commercial Offices & Open Workspaces — Back-lit frosted polystyrene optics and up to 147.3 lm/W efficacy deliver uniform overhead illumination.
• Chicago & Municipal Plenum Ceilings — CCEA environmental air-space certification and IC-Rated housing satisfy strict municipal plenum codes.
• Schools, Universities & Classrooms — Field-adjustable 50W/40W/30W power and 3500K/4000K/5000K CCT customize light levels for educational spaces.
• Healthcare & Medical Clinics — Clean architectural flat-panel aesthetics, 100,000-hour L70 lifespan, and 0–10V continuous dimming support clinical interiors.
• T-Grid, Hard Ceiling & Drywall Installations — Recesses into 2x4 T-grids or adapts to hard ceilings via optional SMKEZPAN2X4 surface or RMKPANEL2X4 drywall kits.

What's Included

• RAB T17FA-2X4 Field-Adjustable 2x4 Back-Lit LED Flat Panel — White (Sold in quantities of 2 units packaged per box)
• Installation instructions