Keystone KT-SWLED25PS XFit Color & Power Select 2ft LED Stairwell Fixture — 25W/20W/15W Selectable — 3500K/4000K/5000K — Motion Sensor — White / Frosted PMMA Lens

The Keystone KT-SWLED25PS-2A-8CSA-VDIM-P is a commercial 2ft XFit LED Stairwell Fixture engineered to deliver up to 3,150 lumens with field-adjustable 25W/20W/15W Power Select settings (multi-wattage selectable driver, field-adjustable lumen output, variable power settings) and switchable 3500K/4000K/5000K Color Select temperatures (field-adjustable CCT, color temperature selectable, tunable white, switchable Kelvin). Operating on 120–277V electrical systems with 0–10V continuous dimming (dim-to-off), this luminaire combines a post-painted steel body with a smooth, diffused PMMA lens for uniform illumination in stairwells, corridors, and hallways. Built with a UL Listed 1598 Damp Location rating, it is qualified for commercial utility rebates under DLC Listed standards and features an integrated ultrasonic dimming occupancy sensor for automated bi-level lighting control.

Key Features

• Selectable Wattage: 25W/20W/15W — field-adjustable via onboard Power Select switch (multi-wattage selectable driver / variable power settings; preset to 25W)
• Maximum Lumen Output: 3,150 lm peak at 25W
• Peak Efficacy: Up to 132 lm/W for high-efficiency commercial operation
• CRI: >80 color rendering across all settings (ANSI C78.377-2017 color uniformity)
• Selectable CCT: 3500K/4000K/5000K — field-adjustable via onboard Color Select switch (color temperature selectable / tunable white / switchable Kelvin; preset to 5000K)
• Lens & Optics: Smooth, diffused PMMA lens for uniform, glare-free distribution
• Dimming: 0–10V continuous dimming down to 10% (dim-to-off capable)
• Voltage: Universal 120–277V AC, 50/60Hz constant current driver
• Location Rating: UL Listed 1598 for damp locations
• Operating Temperature: -4°F (-20°C) to 122°F (50°C) ambient range
• Certifications: DLC Listed, UL Certified / UL Listed 1598, FCC compliant
• Rated Life: 50,000 hours rated life (LED lifetime L70 >100,000 hours @ 77°F / 25°C ambient fixture temperature)
• Warranty: 10-year limited warranty — Keystone Technologies (5-year sensor warranty)
• Sensor Control: Integrated ultrasonic dimming occupancy sensor with adjustable detection range, time delay, and bi-level dimming

Performance & Light Output

At 25W: 3,100 lm (3500K / 124 lm/W), 3,125 lm (4000K / 125 lm/W), 3,150 lm (5000K / 126 lm/W).

At 20W: 2,540 lm (3500K / 127 lm/W), 2,560 lm (4000K / 128 lm/W), 2,580 lm (5000K / 129 lm/W).

At 15W: 1,950 lm (3500K / 130 lm/W), 1,965 lm (4000K / 131 lm/W), 1,980 lm (5000K / 132 lm/W).

CRI >80 across all configurations. Rated life 50,000 hours (L70 >100,000 hours) per IES TM-21 testing.

Form Factor & Design Profile

Engineered specifically for commercial stairwells, corridors, and passageways, the 2ft XFit Premium Series fixture features a post-painted steel chassis with an integrated ultrasonic sensor and a smooth, diffused PMMA lens. The contoured lens profile delivers balanced vertical and horizontal distribution along walls and stair landings without direct glare.

Smart & Control Features

The KT-SWLED25PS luminaire features a factory-integrated ultrasonic dimming occupancy sensor engineered for automated high-resolution presence detection:

• 0–10V Continuous Dimming with Dim-to-Off (Standard): Dims smoothly down to 10% and supports dim-to-off on standard 0–10V low-voltage control circuits.
• Occupancy Sensing & Bi-Level Dimming: When motion is detected, the sensor brings illumination up to 100% lumen output. When motion ceases for the duration of the selected time delay, lighting dims to the programmed standby level.
• Trimpot #1 (Detection Range): Adjusts motion sensitivity across Low (13 ft max range wall-mounted), Medium (18 ft), and High (35 ft) settings at an 8–12 ft mounting height.
• Trimpot #2 (Time Delay): Configures the hold time that the fixture remains at 100% output after vacancy to 1 minute, 5 minutes, or 20 minutes.
• DIP Switches (Standby Dimming Level): Two dipswitches set the standby low light level to Off (Off/Off), 10% (Off/On), 25% (On/Off), or 50% (On/On).
• Test Button & Relay Outputs: Push-button test mode sets the time delay to 5 seconds for 5 minutes (flashes 2 times to start, 3 times to exit) for quick commissioning. Two additional High and Low motion outputs can be used to control external relays or control circuitry.

Electrical

Powered by a Keystone 0–10V dimming LED driver operating on 120–277V AC at 50/60Hz. Delivers high electrical efficiency with a Power Factor >0.95 (>0.90 minimum) and Total Harmonic Distortion (THD) <20%. Includes pre-wired 0–10V dimming leads. Sensor operates on 12–24V DC (45mA sensor consumption) with a 0–10V output sink capacity of 100mA (up to 50 LED drivers).

Emergency Battery Backup: Compatible with Keystone SmartSafe emergency LED drivers to provide 90 minutes of standby emergency illumination during a power outage, including 5W constant-wattage backup KT-EMRG-LED-5C-500 (suffix /EM5, ~500 lumens, CEC T20 compliant) and 12W constant-wattage backup KT-EMRG-LED-12C-1200 (suffix /EM12, ~1,200 lumens, CEC T20 compliant) — sold separately.

Construction

Housing & Thermal: Post-painted steel body engineered for commercial durability and thermal dissipation.

Lens & Optics: Smooth, diffused PMMA lens delivering uniform, glare-controlled light distribution.

Finish: White post-painted finish formulated for high resistance against corrosion and surface wear.

Environmental Sealing: UL Listed 1598 for damp locations. Operating ambient temperature range: -4°F (-20°C) to 122°F (50°C). Sensor operating temperature range: -22°F (-30°C) to 158°F (70°C).

Dimensions & Weight: 23.9" L × 4.9" W × 5.6" H.

Installation & Mounting

Standard Mounting: Designed for surface mounting directly on walls or ceilings in stairwells and corridors at a recommended mounting height of 8 to 12 feet.

Accessories (Sold Separately):

• Wire Guard: KT-SWLED-WG-1-KIT (thick steel wire guard with premium white powdercoat) — sold separately
• Sensor Cover Plate: KT-SWLED-CP (replacement cover plate used to conceal sensor trimpots) — sold separately
• Step-Down Transformer: KTAT-250-480-277/SF (fully enclosed single flex step-down transformer, 250VA or lower, suffix /480) — sold separately
• Emergency Battery Backups: KT-EMRG-LED-5C-500 (5W, 500 lm, 90 min, CEC T20, suffix /EM5) and KT-EMRG-LED-12C-1200 (12W, 1200 lm, 90 min, CEC T20, suffix /EM12) — sold separately

Certifications & Rebates

• DLC Listed: Qualifies for commercial utility rebate incentives across regional energy efficiency programs. To confirm rebate eligibility with your local utility provider, visit designlights.org and search DLC Product ID PTTTLA44.
• UL Listed 1598: Certified for damp locations per UL standards.
• ANSI C78.377-2017: Meets correlated color temperature (CCT) uniformity guidelines across all selectable steps.
• NLB Trusted: Verified under the National Lighting Bureau Trusted Warranty Program (10-year limited fixture warranty).

Typical Applications

• Commercial Egress Stairwells — Integrated ultrasonic sensor detects multi-directional movement around corners and landings to automate 100% full-output and standby dimming
• Interior Corridors & Hallways — Field-adjustable 25W/20W/15W power settings and 3500K/4000K/5000K CCT allow tailored ambient illumination across diverse commercial spaces
• Hospitality & Multi-Family Common Areas — 10-year limited warranty, L70 >100,000-hour LED life, and bi-level occupancy dimming minimize 24/7 facility energy costs
• Retail & Office Back-of-House Passageways — Post-painted steel body and smooth diffused PMMA lens provide clean, glare-free illumination in high-traffic pathways
• Parking Structure Vestibules & Utility Stair Towers — UL 1598 damp location construction with optional wire guard protection withstands rigorous commercial environments

What's Included

• Keystone KT-SWLED25PS-2A-8CSA-VDIM-P 2ft LED Stairwell Fixture — White
• Integrated ultrasonic dimming occupancy sensor
• Installation and wiring instructions