The M960SRLED Monterro acorn luminaire combines traditional aesthetics with advanced LED technology to create a decorative yet highly functional lighting solution. Designed with a spun aluminum shade, a cast aluminum finial, and a solid cast aluminum roof, this fixture maintains the timeless look of historic acorn post tops while delivering modern efficiency and performance. The extended spun roof reduces uplight and enhances visual appeal, while optimized heat sinks within the roof maximize LED longevity and reliability. The acorn lens is sealed to the roof, ensuring a moisture-free and bug-free optics chamber that preserves clarity and protects the light source in demanding outdoor environments.
This luminaire is available with Intellistreets® Technology, a fully integrated system that provides cities and municipalities with the ability to monitor, record, and respond to street-level activity. Through cameras, audio sensors, and connected communication features, Intellistreets transforms a traditional post top light into a multifunctional smart city device. The system’s capabilities can support public safety, emergency response, and community engagement, while blending seamlessly into the decorative fixture design.
The fitter options enhance both durability and serviceability. Constructed from low-copper aluminum alloy for high tensile strength and corrosion resistance, the fitter is designed with ease of maintenance in mind. Options include a heavy-duty sand-cast fitter or a utility fitter with additional features such as a hinged, tool-less entry door, a terminal block for simplified wiring, a GFCI outlet for auxiliary power, and an optional twist-lock photocontrol receptacle. For ultimate convenience, a twist-lock mechanism allows tool-free, quarter-turn removal of the acorn globe for maintenance or replacement, while a one-piece gasket provides insect resistance.
The acorn lens is available in clear textured DR acrylic or UV-stabilized polycarbonate, both impact resistant and engineered through injection molding for glare mitigation. Serviceability is prioritized with easy access to the lens in the field and tool-less entry to the driver compartment after the acorn is removed. The fixture is UL listed per UL1598 and CSA C22.2 No. 250.0, making it suitable for wet locations, and is also rated IP65, ensuring superior protection against dust and water intrusion.
At the core of the luminaire is a UL recognized LED driver securely mounted within the housing. The high-efficiency driver operates at 50/60 Hz, supports 0-10V dimming, and includes supplemental surge protection in compliance with IEEE/ANSI standards. With overload, short-circuit, and overheat safeguards, the driver ensures long-lasting performance with a total harmonic distortion (THD) of less than 20% and a power factor greater than 0.9. An optional Fixed Dimming Resistor Board (FDRB) provides a 10-step selector switch for fine-tuned light output adjustments ranging from 25% to 100%. Photocontrol options include button-type sensors mounted directly to the fixture or twist-lock photocells mounted on the roof or utility fitter, offering automatic dusk-to-dawn operation.
The LEDs themselves are engineered for sustainability and longevity. Fully shielded in a downward-facing position, they maximize efficiency while minimizing light pollution. Thermal management ensures effective heat dissipation, and the LEDs are compliant with RoHS standards, containing no hazardous materials such as lead or mercury. Lumen maintenance is backed by LM-80 test data and TM-21 calculations, with a predicted lifespan of up to 100,000 hours at L70 performance. Standard configurations feature a 4000K nominal CCT, with options available in 2700K, 3000K, 3500K, and 5000K, and a minimum CRI of 70, with higher CRI options available upon request. Individual refractor optics allow for multiple light distribution patterns (Type II, III, IV, or V), tested to IESNA LM-79 standards. For additional control, the optional BLOC (Back Light Optical Control) feature reduces backlight and glare without altering the fixture’s historic appearance.
A high-quality finish system protects the fixture while enhancing its decorative value. The standard six-stage polyester powder coat process exceeds AAMA and ASTM standards for durability, offering resistance to fading and environmental wear. Standard finish colors include Black, White, Park Green, Medium Bronze, and Dark Bronze, while the Sternberg Select antique palette introduces unique finishes such as Old World Gray, Verde Green, and Swedish Iron, which develop character over time. Custom finishes, including Weathered Brown, Cedar, Old Iron, and Weathered Black, are also available, along with two-tone and custom-matched finishes to suit site-specific architectural themes. Stainless steel hardware is provided, with protective coatings matched to finish selections for long-term corrosion resistance.
Weighing 48 pounds with an EPA rating of 1.4 ft², the M960SRLED Monterro luminaire is both robust and versatile. With its combination of traditional acorn styling, cutting-edge LED performance, and the option for advanced Intellistreets® integration, it offers municipalities, campuses, and public spaces a lighting solution that balances beauty, efficiency, and intelligence.
https://www.sternberglighting.com/products/647/m960srled-monterro
