This light meter is indeed very useful to applications like in the fields of cinematography, in scenic design, in determining optimum light level for a scene, in the general field of lighting, in reducing the amount of waste light used in the home, in ensuring proper light levels for plant growth. And even in measuring luminance in any environments such as illumination control, weather observation and work places like factories, offices, shops, schools, restaurants, beauty salons, electro-optical sources, research teaching, metallurgy building, industry inspection, and agriculture research.