The Ketra D2 LED downlight redefines the boundaries of residential and architectural lighting, offering unprecedented precision, quality, and versatility. Every element of the fixture has been reimagined, including the emitter, optic profile, aiming system, and housings, resulting in a quieter, more artful, and highly precise light source. The D2 delivers Ketra Natural Light quality in a compact form factor that integrates seamlessly into ceilings while emphasizing the quality of light itself.
With a two-inch aperture, the D2 downlight is the smallest fixture capable of producing true Ketra light. Breakthrough optics and the ultra-compact aperture allow the fixture to nearly disappear into the ceiling, placing the focus entirely on the light output. The fixture incorporates a tilt-and-rotation system with lockable positioning, enabling precise placement of Ketra TruBeam optics. Fine adjustments of up to 40 degrees tilt and 364 degrees rotation ensure light is directed exactly where it is needed, while preventing spill or unwanted glare.
The D2 downlight is constructed to harmonize with architectural details. Trims are sculpted from die-cast aluminum, painted for a smooth finish, and available in flanged, flangeless, or mud-in options. Multiple aperture shapes, including round and square, allow customization to suit residential or commercial interiors. Field-changeable optics optimize beam angles between 15 and 60 degrees, while lenses and accessories can be mounted at the primary optic, trim, or in combination to refine the room-side appearance or diffuse light, reduce glare, and control beam distribution.
Ketra Natural Light technology delivers full spectrum light that closely replicates natural sources, from candlelight to moonlight. The system includes high-definition color capability covering 16.7 million colors, pastels, saturated hues, and high CRI whites from 1,400 K to 10,000 K. Dynamic Spectrum control tunes energy across the visible spectrum to produce natural dimming, full-spectrum output, or vibrant color effects. TruBeam optics ensure uniform color across all beam angles, while Color Lock maintains desired color points at a one-step MacAdam Ellipse over the fixture’s lifetime. Closed-loop optical and thermal feedback maintains accuracy of color point across operating conditions.
The D2 downlight is highly modular and serviceable. Housings are available in ultra-slim 2-inch fixed or wall-wash profiles and 3.5-inch adjustable configurations for maximum versatility. Housings are lightweight, airtight-rated, and suitable for wet, exterior, and sloped ceiling applications when paired with trim lenses. Field-replaceable power supplies and emitters improve wireless performance and enable standard or spot lighting configurations. A universal collar adapter accommodates six different collars to meet diverse architectural conditions.
Wireless control and integration are facilitated by Lutron Clear Connect Type X technology, enabling re-zoning and modifications without additional control wiring. D2 fixtures can be commissioned into Lutron HomeWorks or Athena systems, providing fully customizable control of color, intensity, and spectral power distribution. The system automatically mimics natural daylight cycles, transitions from high CCT at high intensity to low CCT at low intensity, and maintains intensity while adjusting color spectrum or CCT. Dimming ranges from 100 to 0.1 percent measured luminous flux, allowing precise adjustment and seamless transition for dynamic residential or commercial environments.
Electrical and environmental specifications include 18 W power consumption, 120 V~ 60 Hz input, power factor greater than 0.9, 2.5 kV surge protection, and 800 mA inrush current at 0.2 milliseconds. Ambient operating temperatures range from 32 to 104 °F (0–40 °C), with extended capability down to -32 °F (-35 °C), and relative humidity tolerance of 0–95 percent non-condensing. The fixture is UL and cUL certified, FCC Class B and IC rated, and compliant with Title 24 JA8 standards. Wet location certification is available for trim lens installations, and outdoor use is limited to fixed or adjustable options in covered residential patios.
The D2 LED downlight incorporates a single-source, multi-die modular emitter that combines monochromatic and phosphor-converted blue LED dies. The fixture achieves a CRI greater than 90 at any point along the black body curve from 2,700 K to 5,000 K, with a minimum estimated useful life of 50,000 hours at 70 percent lumen maintenance based on IES LM-80 data. Integrated wireless diagnostics provide real-time monitoring of input voltage and connectivity status. Ketra warranties the light source for five years or 25,000 hours, whichever is less.
Ketra D2 downlights are ideal for fixed, adjustable, and wall-wash applications in residential and architectural environments. The system combines precise beam control, exceptional color quality, extensive customization options, and wireless integration to create dynamic, natural, and visually engaging lighting experiences while maintaining long-term color point stability and reliability.
https://luxury.lutron.com/us/en/ketra-d2-downlight
