Measuring Instruments
Measurement of work environment (ambient brightness) or the brightness at night or the illumination such as lamps.
Official government testing / R&D by illumination manufacturers / repair and maintenance in factories, offices, and hospitals / quality control by manufacturers of home-use lighting products / examination of commercial light sources / illuminance control in agriculture and forestry, etc.
Measurement of the tristimulus values, chromaticity, color differences, correlated color temperature and illuminance of display devices such as CRT and LCD and of light sources.
R&D, examination and quality control for projector light sources, CRTs and color LCDs, light boxes, fluorescent lights, building / interior lighting products and psychological environments, etc.