Light Intensity Measurement

Photometry deals with the measurement of visible light as perceived by human eyes.

Light intensity measurement.

Measure ambient light in the room. Photography studio the main reasons for measuring light intensity are to ensure that minimum standards of illumination are being met and to determine appropriate exposure times in photography and cinematography. In photometry luminous intensity is a measure of the wavelength weighted power emitted by a light source in a particular direction per unit solid angle based on the luminosity function a standardized model of the sensitivity of the human eye the si unit of luminous intensity is the candela cd an si base unit. To begin turn off any lighting in the room you re about to measure.

Hold the photometer in the area that you want to measure the intensity of the light. How to measure light intensity using a light meter. To measure light intensity use a handheld digital photometer or download an app on your smartphone. Photography studio the main reasons for measuring light intensity are to ensure that minimum standards of illumination are being met and to determine appropriate exposure times in photography and cinematography.

Four commonly encountered situations are set out below. Photometry is distinguished from radiometry in which each separate wavelength in the electromagnetic spectrum is detected and measured including the ultraviolet and infrared photometry. Remember that most office spaces are comfortably lit around 250 500 lux and supermarkets or work spaces that require detailed work are lit around 750 1 000 lux. Using a light lux meter is the best way to measure light intensity it gives us the ability to choose the optimal light intensity for an environment.

Ergonomics and safety minimum illumination levels are recommended for many environments.