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Rainbow-Light Lumen Introduction

Rainbow-Light Technology Co., Ltd. is Taiwan supplier and manufacturer in Optical measuring instrument appliance industry. Rainbow-Light has been offering our customers high quality Spectrometer, UV spectrometer, Infrared Spectrometer, Visible Spectrometer, Fiber Spectrometer, Integrating Sphere, Goniophotometer, Color Measurement, Absorbance Spectrometer, Transmittance Spectrometer, Reflectance Rate Spectrometer, Material Identified Instrument since 2012. With both advanced technology and 20 years experience, Rainbow-Light always make sure to meet each customer's demand.

Lumen

Rainbow-light equipment for measuring luminous flux.
Rainbow-light equipment for measuring luminous flux.

Lumen (ΦV)

The luminous flux and the radiation power, luminous flux is mainly human feel light power. A large number of people with normal vision, the vision of the most sensitive wavelength is about 555.0nm the green light, the human nature of the wavelength spectrum sensitivity of different visual function by V (lambda) light said. Is the amount of radiation power with visual function V (lambda) physical quantity weighted. The provisions of the international unit of luminous flux, the symbol is Phi units, lumens (LM).

Refers to the luminous flux per unit time by the light emitted by the light source, representing a total amount of light emitted by the light emitting body, the unit with the lumen said. Calculation is the radiant flux through the visual function. One lumen is equal to one candle uniform point source radiation for a solid angle radian in the light flux.
In general, you can use a spectrometer to match an integrating sphere or to use a light meter to measure the flux

The luminous flux represents the total power of light; unit of luminous flux is the lumen (lm). The formula is Radiant flux multiply Luminosity function.