Grid-Powered Smart LED Street Light Luminaire with Zhaga D4i / NEMA 7-Pin Interface

Overview

The RC-SL-240 is a grid-powered smart LED street light luminaire engineered by REDCOAST.LTD for urban arterial roads, secondary roads, residential streets and campus road networks where mains power is available. It is built for municipalities, utilities, road authorities and lighting contractors who need to replace aging HPS or first-generation LED fixtures with a future-proof, controls-ready luminaire. The luminaire ships with either a Zhaga Book 18 (D4i) receptacle or a NEMA 7-pin (ANSI C136.41) socket, so any certified photocell or smart lighting controller — including the REDCOAST.LTD CMS node — plugs in without rewiring the fixture. At its core is a REDCOAST.LTD-designed modular LED light engine PCB and a D4i-compliant programmable constant-current driver, giving cities granular dimming, per-luminaire energy metering and predictive diagnostics from day one, while the rugged IP66/IK09 die-cast housing keeps maintenance visits to a minimum over a 100,000-hour service life.

Key Features

• 30–240 W power range in one platform covering residential streets (30–60 W), collector roads (60–120 W) and major arterials or intersections (150–240 W), with luminous flux from 4,200 to 38,400 lm.
• High efficacy up to 160 lm/W using current-generation mid-power LED arrays on a REDCOAST.LTD-designed metal-core PCB with optimized thermal paths.
• Zhaga D4i or NEMA 7-pin smart interface — choose Zhaga Book 18 receptacles (top, or top + bottom for sensors) certified to D4i data standards, or the classic ANSI C136.41 7-pin twist-lock socket; both make the luminaire plug-and-play with third-party CMS nodes.
• DALI-2 / D4i programmable driver with constant light output (CLO), adjustable dimming curves, AUX 24 V supply for nodes and standardized energy/diagnostics data (DiiA Parts 251/252/253).
• Tool-less maintenance: the hinged housing opens without tools, the driver sits on a quick-release gear tray, and the surge protector is a field-replaceable module.
• Precision roadway optics — Type II/III/IV/V distributions and ME/CE-class lens packages so designers can meet EN 13201 or IES RP-8 luminance/illuminance targets with wider pole spacing.
• 10 kV/10 kA surge protection standard (20 kV/10 kA optional) protecting against grid transients and induced lightning surges on overhead lines.
• Low windage, low weight (SCx from 0.045 m²; 5.5–13.5 kg) for safe retrofit onto existing poles and brackets without structural rework.
• Smooth powder-coated die-cast aluminum housing in RAL 7016 anthracite, dark grey, black or custom RAL colors to match streetscape furniture.

Technical Architecture

The luminaire is organized into four serviceable modules. The light engine is a REDCOAST.LTD-designed metal-core PCB carrying high-efficacy LED arrays grouped into strings; the PCB layout, string topology and thermal vias are engineered in-house, which lets REDCOAST.LTD tailor flux packages, CCT mixes or special spectra (e.g. amber for ecologically sensitive zones) per project without waiting for a third-party module roadmap. The engine couples to PMMA precision lens arrays that shape Type II–V and ME/CE roadway distributions.

The driver stage is a DALI-2/D4i-certified programmable constant-current driver with ≥0.95 power factor, <15% THD and configurable output current, enabling one luminaire SKU to be factory- or field-programmed across its wattage window. The driver implements CLO to compensate lumen depreciation, stores asset data (DiiA Part 251) and reports live energy and diagnostics data (Parts 252/253) through the D4i bus.

The control interface layer is the Zhaga or NEMA socket wired to the DALI bus and AUX supply. Any certified controller — the REDCOAST.LTD NEMA/Zhaga CMS node or a third-party node — handles scheduling, adaptive dimming, metering upload and OTA configuration. Data flows from driver to node over DALI-2, then from node to the central management software over the city's chosen backhaul. Because intelligence is layered this way, cities can deploy luminaires first with simple photocells and add networked controls later without touching the fixture.

Connectivity & Power

The RC-SL-240 is a mains-powered (grid) product for electrified urban and campus environments; it deliberately carries no solar panel or battery. The standard driver accepts AC 100–277 V, 50/60 Hz, covering virtually all urban LV networks worldwide; a 277–480 V variant is available for North American utility feeds and series-to-parallel conversions. Inrush is managed for typical 16 A miniature circuit breakers, and standby consumption with the node idle is under 0.5 W.

Connectivity is delegated to the socket-mounted controller, so each project picks the backhaul that fits its scale: cellular LTE Cat-M1/NB-IoT or 4G nodes for city-wide deployments riding public networks, LoRaWAN for utilities running private networks, or RF mesh/Zigbee for dense district grids. For standalone streets, a simple photocell or the driver's built-in astronomical dimming schedule operates the luminaire with no network at all.

Protection & Reliability

The one-piece die-cast aluminum housing is finished with chromate-free pretreatment and a smooth polyester powder coat, achieving IP66 ingress protection for the full luminaire and IK09 impact resistance (IK10 with tempered-glass option). Operating range is -40 °C to +55 °C, validated with thermal derating profiles so LED junction temperatures stay within L90 limits even in hot climates. Coastal and industrial deployments are covered by a C4/C5 marine-grade coating option tested to 1,000 h neutral salt spray (ISO 9227). Vibration durability is tested to ANSI C136.31 (3G, bridge/overpass level). Lumen maintenance is projected at L90 ≥ 100,000 h (IES TM-21 from LM-80 data), and the field-replaceable SPD fails safely with a visual indicator. REDCOAST.LTD supports a 5-year standard warranty, extendable to 10 years for framework contracts.

Application Scenarios

• Urban arterial and collector roads: 150–240 W units on 10–12 m poles deliver EN 13201 ME-class luminance with adaptive midnight dimming, typically cutting energy 60–70% versus HPS.
• Residential streets and old-town districts: 30–60 W units with Type II optics and 2700–3000 K warm CCT reduce light trespass into homes while keeping P-class uniformity for pedestrians.
• Campus, business park and factory road networks: facility owners run the luminaires on a private LoRaWAN CMS, gaining per-fixture energy billing across tenants and fault tickets pushed straight to the maintenance team.
• Highway interchanges and ring roads: high-flux 240 W packages with Type V or asymmetric optics light conflict areas, with 20 kV surge option for exposed overhead feeds.
• HPS retrofit programs: the luminaire's spigot fits existing Ø48–76 mm brackets and its low weight/windage avoids pole replacement, making one-to-one swaps fast and financeable through energy savings.
• Tunnel approach and underpass thresholds: paired with the REDCOAST.LTD tunnel lighting controllers, the same D4i platform handles approach-road luminance grading.

Case-style Examples

Arterial road HPS-to-LED retrofit. A road authority replacing 250 W HPS fixtures on a 14 km arterial selected 150 W RC-SL-240 units with ME3c optics and NEMA 7-pin sockets. Existing poles and spacing were kept; photometric layouts confirmed EN 13201 compliance before installation. With 50% midnight dimming via CMS nodes, measured energy savings exceeded 68%, and per-luminaire metering let the authority verify savings against the ESCO contract monthly.

Business-park private smart lighting network. An industrial park operator deployed 60 W and 100 W variants with Zhaga D4i receptacles and LoRaWAN nodes on a private gateway. Luminaires near warehouse gates hold 100% output during shift changes and dim to 30% otherwise, driven by schedules in the CMS. Fault alarms replaced night patrols, cutting lighting O&M labor roughly in half.

Coastal boulevard upgrade. A seafront municipality specified the C5 marine coating option, tempered-glass IK10 covers and 316 stainless external fasteners. After two storm seasons the powder-coated housings showed no corrosion creep, and the field-replaceable SPDs absorbed multiple surge events with only indicator-flagged module swaps — no luminaire failures.

Customization & Selection Guide

Start from the road class: P-class residential streets typically need 30–60 W with Type II optics; M/ME collector roads 60–120 W with Type III; arterials and interchanges 150–240 W with Type III/IV/V. Choose CCT next — 3000 K where light-pollution ordinances or resident comfort dominate, 4000 K for maximum efficacy on traffic routes. Pick the smart interface by ecosystem: Zhaga D4i for European-style tenders demanding certified interoperability and bottom sensor sockets; NEMA 7-pin where ANSI C136.41 infrastructure is incumbent. Select surge level (10 kV standard, 20 kV for overhead or lightning-prone feeds), coating class (standard vs C4/C5 coastal), and voltage window (100–277 V vs 277–480 V). REDCOAST.LTD engineers can also adjust the light engine PCB itself — custom flux packages, amber/PC-amber spectra, or dual-channel white tuning — because the board is designed in-house.

Deployment & After-sales

Installation is a one-person job per fixture: slide the luminaire onto the Ø48–76 mm spigot, set tilt (±15° in 5° steps), torque the clamp, connect mains via the external quick connector, and twist in the photocell or CMS node. No tools are needed to open the housing for driver or SPD service. REDCOAST.LTD supplies photometric files (IES/LDT), EN 13201/RP-8 layout support and factory driver pre-programming so fixtures arrive site-ready. Typical production lead time is communicated per order volume at quotation, with batch pre-shipment reports covering photometric and electrical test data. After-sales includes remote CMS diagnostics support, spare-parts kits (driver, SPD, lens module) and engineering response under the 5–10 year warranty framework.

Standards & Compliance

Designed and tested in line with: IEC/EN 60598-1 and -2-3 (luminaire safety), IEC 61547/EN 55015 (EMC), IEC 61000-4-5 (surge), EN 13201 / IES RP-8 (roadway lighting design support), ANSI C136.41 / Zhaga Book 18 + DiiA D4i (control interfaces), ANSI C136.31 (vibration), IEC 60068 / ISO 9227 (environmental and salt spray), EN 62471 (photobiological safety, RG0/RG1), CE (LVD + EMC), RoHS and REACH. ENEC or other regional certification programs can be arranged per project requirement.

Why REDCOAST.LTD

REDCOAST.LTD delivers end-to-end smart lighting solutions — luminaire, NEMA/Zhaga CMS controller, central management software and mobile app — engineered and integrated by one team. What makes that credible is in-house hardware development: the LED engine PCB and control-interface electronics in the RC-SL-240 are REDCOAST.LTD designs, and new board variants can be spun for project-specific spectra, flux packages or interface needs rather than waiting on third-party catalogs. One vendor, one warranty, one data model from the LED board to the dashboard — and every element adjustable to your tender.

Ready to upgrade your streets? Contact REDCOAST.LTD with your road classes, pole data and control requirements for a tailored photometric layout, sample program and project quotation.