Development of Simple and Affordable Integrating Device for Accurate LED Strip Light Measurement.

Area of Science:

• Photometry
• Lighting Engineering
• Optical Measurement

Background:

• LED strips are widely used but difficult to measure accurately with traditional methods like integrating spheres.
• Existing methods suffer from errors due to non-uniform illumination and improper geometry, especially for LED sources.
• High-precision equipment like goniophotometers are expensive and complex.

Purpose of the Study:

• To develop a low-cost, compact integrating device for accurate LED strip light parameter measurement.
• To validate the performance of the new device against established photometric techniques.
• To provide an accessible solution for research and development in LED lighting.

Main Methods:

• Development of a compact cubic integrating device (<1.0 m³).
• Comparative testing against an integrating sphere and a goniophotometer in a professional laboratory.
• Evaluation of luminous flux and colorimetric measurements, including Correlated Color Temperature (CCT).

Main Results:

• The device demonstrated a maximum relative error of approximately 5% for luminous flux compared to goniophotometry.
• Colorimetric measurements showed a maximum CCT absolute error of ~35 K for a 4000 K LED strip, imperceptible to the human eye.
• The device proved effective and reliable for measuring LED strip parameters.

Conclusions:

• The developed low-cost integrating device offers a viable and accurate alternative for LED strip light measurements.
• Its ease of replication and reduced costs make it suitable for companies and research units.
• The device has potential applications for other small, single-hemisphere light sources and is patent-pending.