Light Intensity Meter Name

Luminous intensity is measured in lumens per square meter lux or lx or lumens per square foot foot candles or ft c.

Light intensity meter name.

A klux is a 1000 lux and about 1 1 klux is the minimum light requirements for any plants for at least 12 hours per day to gain any benefit from fertilization. We stay ahead of the competition in the light measurement industry because of an absolute commitment to engineering the highest quality most accurate measuring instruments on the market. Photometry is the science of the measurement of light intensity where light refers to the total integrated range of radiation to which the eye is sensitive. The meter will include either a digital or analog calculator which displays the correct shutter speed and f number for optimum exposure given a certain lighting situation and film speed.

Photometry is distinguished from radiometry in which each separate wavelength in the electromagnetic spectrum is detected and measured including the ultraviolet and infrared. After using the joly photometer to measure comparative light intensities you can measure light intensity using an analog or digital light meter. Radiant intensity a radiometric quantity measured in watts per steradian w sr luminous intensity a photometric quantity measured in lumens per steradian lm sr or candela cd irradiance a radiometric quantity measured in watts per meter squared w m 2. In photography a light meter is used to determine the proper exposure for a photograph.

Newer digital light meters measure light intensity in lux while older analog light meters usually measure light intensity in an older unit called the foot candle defined as 1 lumen per square foot. The majority of light meters used around the world have the konica minolta name on them.