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400W 500W AC LED Flood Lights THX Series
400W 500W AC LED Flood Lights THX Series 400W 500W AC LED Flood Lights THX Series
400W 500W AC LED Flood Lights THX Series 400W 500W AC LED Flood Lights THX Series
400W 500W AC LED Flood Lights THX Series 400W 500W AC LED Flood Lights THX Series
400W 500W AC LED Flood Lights THX Series 400W 500W AC LED Flood Lights THX Series
400W 500W AC LED Flood Lights THX Series 400W 500W AC LED Flood Lights THX Series

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400W 500W AC LED Flood Lights THX Series

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  • SD-THX

  • SUNDE

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The Complete Guide to AC LED Flood Lights: Engineering, Selection & Project Success

For project managers, engineers, and procurement specialists sourcing large-scale outdoor lighting, understanding the core technology behind main-powered LED flood lights is critical for ensuring project longevity, performance, and return on investment. This comprehensive guide delves into the essential engineering principles that define premium flood lighting and outlines the key specifications to evaluate, providing a framework for selecting the optimal solution for any LED Flood Light Project or Street Light Project.


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Understanding Main-Powered LED Flood Lights: The Engine of Modern Illumination

Main-powered, or line-voltage, LED flood lights are designed to connect directly to standard AC electrical grids (e.g., 120V/230V/277V). They are the cornerstone of commercial, industrial, and municipal lighting due to their high luminous output, robust construction for harsh environments, and seamless integration with existing infrastructure. The shift from traditional HID to LED technology in this category represents a significant advancement in energy efficiency, controllability, and lifespan, but it introduces new engineering challenges centered on thermal management and electrical stability.

Brand Name SUNDE
Item No. SD-THX
Product Type LED Flood Light
Power 100w-150w 200w-240w 320w-400w 400w-500w
Lamp Size(mm) 460*63*288 528*63*337 622*63*402 676*63*452
PC 9 pcs 16 pcs 25 pcs 36 pcs
5050 pcs 72 128 200 288
Beam Angle 15°/30°/60°/90°
IP Rating IP66 Waterproof
IK Rating IK 09
Material Die Casting Aluminum


The architecture of a high-performance unit integrates three critical subsystems:


1.The Optic & LED Module: This includes high-density arrays of SMD or COB LEDs (such as 3030 or 5050 chips) mounted on thermally conductive MCPCBs (Metal Core Printed Circuit Boards). The quality of the LED chip directly impacts efficacy (lumens per watt) and color consistency.


2.The Driver (LED Power Supply): This component is the heart of the fixture, converting unstable AC mains power into a stable, constant current DC supply for the LEDs. Its design determines the system's electrical efficiency, power factor, surge immunity, and overall reliability.


3.The Thermal Management System: Arguably the most critical element, this passive system comprises heatsinks, housing geometry, and surface treatments designed to pull heat away from the LED junction. Effective thermal design is the primary determinant of an LED's lifespan and sustained light output.


Premier manufacturers, especially those operating advanced stadium light factory and China Flood Light factory facilities, excel in harmonizing these subsystems. A key design philosophy is the (Thermoelectric Separation Structure), which physically and thermally isolates the high-temperature LED module from the more temperature-sensitive driver components, ensuring both operate in their optimal temperature ranges.


The 6 Pillars of Specification: A Checklist for Your Professional Lighting Project

Selecting a fixture based solely on wattage and price is a common pitfall. For professional-grade outcomes, evaluation must be based on these six engineering and performance pillars.


1. Advanced Thermal Management & Predictive Lifespan (Lxx/Bxx)

LEDs degrade faster at high operating temperatures. Superior fixtures are designed using Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEA) to model heat dissipation before production. This results in a design with maximized surface area, optimal fin geometry, and a low thermal resistance path from the LED junction to the ambient air.


What to Look For: Request the (Temperature Rise Curve). A flat, stable curve indicates excellent thermal control. The industry standard lifespan metric is L70/B50, meaning after the stated hours (e.g., 50,000+), 50% of fixtures will still be emitting at least 70% of their initial light output. This is directly tied to thermal design excellence.


2. Uncompromising Environmental Protection (IP & IK Ratings)

l IP66 Rating Explained: The first digit '6' denotes "Dust Tight" – complete protection against ingress. The second digit '6' means protection against "Powerful Water Jets" from any direction. This rating is non-negotiable for fixtures exposed to monsoons, coastal salt spray, dust storms, or industrial cleaning.


l IK09/IK10 Rating Explained: This measures protection against mechanical impacts. IK09 (1 Joule impact, akin to a 5kg mass dropped from 20cm) is essential for vandal-prone areas or locations where accidental contact is possible, such as in a Street Light Project. It ensures the integrity of the tempered glass and housing.


3. Precision Optical Engineering & Beam Control

The purpose of a flood light is to put light where it is needed, minimizing spill and glare. Beam angle selection (e.g., 15° narrow spot, 30° medium flood, 60° wide flood, 120° extra wide) is application-specific.


l Narrow Beam (15°-25°): Ideal for long-throw applications: lighting flagpoles, architectural facades from a distance, or as task lighting in a stadium light factory setting.


l Medium Beam (30°-60°): The most versatile for area lighting: parking lots, building perimeters, sports fields, and pedestrian pathways.


l Wide Beam (90°+): Used for lighting broad, shallow areas like under canopies or for wall washing.


Reputable manufacturers provide verified IES (Illuminating Engineering Society) files for each product, enabling precise lighting simulation software (like Dialux) to model illuminance levels and uniformity before installation.


4. Electrical Robustness & Surge Protection

Outdoor lighting is on the front line of electrical grid anomalies. Lightning strikes (even indirect) and power station switching can induce transient voltage surges that destroy electronics.


l Integrated SPD (Surge Protection Device): A high-quality fixture will include an SPD rated for a specific protection level (e.g., 10kV/5kA). This component sacrificially diverts surge energy to ground, safeguarding the driver and LEDs. For any large-scale LED Flood Light Project, especially in surge-prone regions, this is a critical investment in system uptime.


5. Structural Integrity & Material Science

The housing is the first line of defense.


l Material: Die-cast aluminum (e.g., ADC12) is the premium choice. It offers excellent strength-to-weight ratio, superior corrosion resistance, and acts as an integral part of the heatsink. Its manufacturing consistency ensures proper sealing.


l Sealing: Dual-silicone gaskets and compression systems are used to create the IP66 seal against the tempered glass cover.


l Finish: A high-quality, electrostatic powder-coat finish (typically polyester or polyurethane) provides UV resistance and protection against chemical corrosion.


6. Installation, Maintenance & Safety Features

Total cost of ownership includes labor.


l Modular & Tool-Free Design: Features like tool-free buckle latches or quick-connect electrical terminals drastically reduce installation and maintenance time.


l Safety Cut-Off: A mandatory safety feature where the internal circuit is automatically disconnected when the housing is opened, protecting maintenance personnel.


l Versatile Mounting: A comprehensive product family should offer multiple bracket options (U-brackets, knuckle arms, pole mounts) and adjustable angles (±180° pan, ±90° tilt) to accommodate any site requirement.

Application-Specific Solutions: Matching Technology to Environment

A one-size-fits-all approach fails in professional lighting. Here’s how specification maps to application:


For High-Mast & Stadium Light Factory Applications

Fixtures must deliver high, uniform illuminance with excellent vertical aiming control and minimal glare for players and cameras. Key features include narrow/medium beam optics, exceptional thermal performance for continuous high-power operation, and rugged construction to withstand wind loads at height. Reliability is paramount to avoid costly event disruptions or arena downtime.


For Municipal & Roadway Street Light Projects

Compliance with roadway lighting standards (e.g., EN 13201, IESNA RP-8) for uniformity and glare control (G-class) is essential. Fixtures require precise Type II, III, or IV light distributions, high ingress protection (IP66), superior surge immunity for grid-connected assets, and vandal resistance (IK09/10). Ease of maintenance from a bucket truck is also a key design consideration.


For Industrial & Perimeter Security LED Flood Light Projects

In ports, rail yards, and logistics centers, fixtures face extreme conditions: vibration, chemical exposure, and 24/7 operation. Here, robust die-cast construction, corrosion-resistant finishes, and wide operating temperature ranges are critical. Instant-on capability and consistent output in cold weather are also vital, as inferior drivers can fail to start in low temperatures.


For Architectural & Area Enhancement

Beyond pure function, aesthetics matter. Fixtures with sleek, low-profile designs, optional color temperatures (2700K-6000K), and precise optics allow lighting designers to highlight textures, create ambiance, and enhance safety without visual intrusion.


The Manufacturing Advantage: Why Proven Factories Matter

The consistency and quality of a lighting product are inseparable from the capabilities of the China Flood Light factory that produces it. Partnering with a manufacturer with deep expertise offers tangible benefits:


l Vertical Integration & QC: Control over the supply chain—from aluminum casting and PCB assembly to final aging testing—ensures consistency. Every batch should undergo rigorous testing, including photometric analysis, thermal imaging, and IP validation.


l OEM/ODM Proficiency: Experience in producing for global brands means adherence to international certification standards (CE, RoHS, UL, DLC) and the ability to provide custom solutions—from optics and housing color to special voltages and smart control interfaces.


l Project Support & Scalability: A true partner provides more than a product catalog; they offer technical support, free photometric simulations, and reliable logistics to ensure a project stays on schedule from the first sample to the delivery of thousands of units.


Conclusion: Specifying for Value, Not Just Cost

The evolution of the main-powered LED flood light has transformed outdoor lighting from a commodity into a sophisticated electro-optical system. The lowest upfront cost often leads to the highest long-term cost through premature failure, high maintenance, and energy waste.


Informed specification—focusing on thermal management, optical control, structural robustness, and electrical protection—is the path to a successful project. It is an investment in light that delivers safety, security, and functionality for a decade or more.


By understanding the engineering principles outlined in this guide and partnering with a capable manufacturer, project stakeholders can confidently navigate their next Street Light Project, LED Flood Light Project, or industrial lighting upgrade, ensuring a result that is both brilliant and enduring.



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