List of bicycle lights’ performance figures (lumens, runtime, etc.) measured with an integrating sphere

I measured bicycle lights’ performance figures such as lumens and runtime with my integrating sphere (se...

Explanation of useful indicators for light selection, “Average Lumens”, “Total Lumen Output”, and “LWR”

When we choose a light, there are several performance indicators we should focus on. For example, the brightne...

How to measure lumens of a light with an integrating sphere

It is quite easy to measure the illuminance of a light at a single point. However, it’s not easy to meas...