An LED array/module is a fundamental component within LED lighting systems that integrates multiple individual LED chips onto a single substrate or circuit board. It functions as the primary light source, with the arrangement and configuration of LEDs determining the overall light output pattern, intensity, and color characteristics. These modules are designed for easy integration into larger lighting fixtures and systems, providing standardized electrical and mechanical interfaces.
Typical materials include semiconductor chips (e.g., GaN, GaAs), ceramic or metal-core PCB substrates, phosphor coatings for white LEDs, encapsulation epoxy or silicone, and copper traces. The substrate material is often aluminum for thermal performance. Modules are available in a range of rated powers (10–200 W), luminous flux (1000–20000 lm), color temperatures (2700–6500 K), and color rendering indices (80–95 Ra). Forward voltage typically ranges from 9–36 V DC, forward current from 350–1400 mA, and efficacy from 100–200 lm/W. Operating temperature is -40 to 85 °C, storage temperature -40 to 100 °C, and ingress protection ratings range from IP54 to IP65. Thermal resistance is typically 0.5–2.0 K/W, dimensions from 50×50 to 300×300 mm, and weight from 50–500 g.
These modules are used in various lighting applications, including general illumination, commercial lighting, and specialty fixtures. When selecting an LED array/module, verify model-specific parameters such as electrical ratings, optical performance, thermal characteristics, and mechanical dimensions with the manufacturer or supplier. Standards like IES LM-79, IES TM-30, and IEC 60529 serve as references for testing and classification, but do not imply certification of a specific product. Always confirm compliance and suitability for your application with the legal manufacturer.
LED arrays/modules operate by converting electrical energy into light through electroluminescence. When forward voltage is applied to the semiconductor material within each LED chip, electrons recombine with electron holes, releasing energy in the form of photons. The array/module configuration allows for controlled current distribution across multiple LEDs, enabling uniform illumination, color mixing, and thermal management through the substrate design. The substrate, often metal-core, aids in heat dissipation, while phosphor coatings may convert blue light to white. The arrangement of chips determines the light pattern and intensity.
