The 4-inch CRD cleanroom downlight is purpose-built to deliver superior lighting quality and cleanliness within laboratory, medical, and controlled environments. Engineered for laboratories, hospitals, and cleanrooms, this recessed LED fixture provides a sealed, smooth, and easy-to-clean aperture that prevents the infiltration of airborne contaminants into sterile spaces. Its design ensures an uncompromised hygienic barrier between the fixture and the cleanroom ceiling, maintaining compliance with rigorous cleanliness standards. With a low cutoff angle, the CRD downlight minimizes glare on glossy surfaces and computer monitors, supporting visual comfort and accuracy in highly controlled workspaces.
Capable of producing up to 5,000 lumens, the CRD series offers powerful, flexible illumination with full-range dimming down to 1%, allowing users to fine-tune brightness for task-specific needs. It is available with multiple color temperature options ranging from 2700K to 5000K and an optional ultra-high color rendering index (97+ CRI with very high R9 value), providing exceptional color accuracy and natural light rendering critical for laboratory and medical applications.
Constructed to meet demanding specification-grade requirements, the CRD downlight integrates a robust 18-gauge steel install frame supported by two vertically adjustable butterfly brackets. The frame is designed to accommodate various ceiling configurations, including grid, drywall, or cleanroom panel systems up to 2.5 inches thick. A large junction box with five ½-inch trade-size knockouts simplifies electrical connections, while a plaster ring attachment enables post-installation adjustment from below the ceiling, ensuring precise alignment and accessibility.
The optical assembly is meticulously factory-sealed to preserve its clean aesthetic and long-term performance integrity. The integrated heat sink, reflector, lens, and trim are sealed together using long-life EPDM closed-cell gasket materials, forming a continuous barrier against dust and moisture. The assembly is held securely in place with torsion springs and vertically adjustable collars that adapt to a variety of ceiling thicknesses, allowing seamless and durable installation.
The CRD’s standard optical configuration includes a clear, flat, 0.125-inch-thick high-impact polycarbonate lens. This lens is sealed into the trim assembly using a die-cast ring that provides continuous compression between the lens, reflector, and gaskets, ensuring a tight, contamination-resistant seal. Its smooth exterior facilitates effortless cleaning, an essential feature for maintaining compliance with cleanroom sanitation requirements. Die-cut closed-cell EPDM foam gaskets complete the system, sealing the lens to the trim and reflector for total environmental protection.
At the heart of the CRD downlight is a factory-sealed COB (Chip-on-Board) LED light engine, field-replaceable and serviceable from below the ceiling for easy maintenance. The LED modules are optimized for efficiency and consistency, offering color uniformity within 2 SDCM and available in multiple CRI options: standard 80+, premium 90+, and ultra-high 97+ for critical color rendering tasks. The fixture maintains an exceptional lifetime performance with L70 ratings exceeding 60,000 hours, ensuring reliability and energy efficiency for long-term operation.
The electrical system features a constant-current programmable electronic driver that provides smooth dimming to 1% using a 0–10V protocol. It operates with high efficiency (greater than 85%) and low total harmonic distortion (under 10%), ensuring stable and flicker-free light output. The system supports input voltages of 120–277Vac or 347Vac at 50/60Hz, with optional DALI dimming driver configurations available for advanced lighting control systems.
Every CRD downlight undergoes a five-stage pretreatment process and is finished with an antimicrobial gloss white polyester powder coating that inhibits bacterial growth, promoting a clean and hygienic surface. An optional antimicrobial matte white finish is also available for design flexibility.
Installation is designed for recessed Non-IC configurations and is compatible with T-bar grid and F-type drywall ceilings, including 9/16” (NFG), 15/16”, 1”, and 1.5” grid systems. The plaster ring provides vertical adjustment for ceilings ranging from ½ inch to 2.5 inches thick. Installation should be performed under a covered structural ceiling to ensure protection against moisture and contaminants.
Certified and rated for the most demanding environments, the CRD downlight meets UL and ETL standards and is approved for wet locations. It carries an NSF2 certification for splash zone use and complies with ISO Class 3–9 cleanroom requirements. The fixture also meets EU GMP Grade A standards and is suitable for biosafety levels BSL-1 through BSL-3. With an IP65 ingress protection rating, the CRD ensures full resistance to dust and water jets, making it an ideal lighting solution for healthcare, pharmaceutical, and cleanroom facilities that demand exceptional cleanliness, durability, and visual performance.
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