Lux Light Meter Pro

„Light meter” would like to paste from “Messages” pops up to me from time to time😱

God

Nie działa

Nice one

Tap the "sun" button to measure illuminance once. Tap and hold it to enable realtime measurement mode. Tap it again to exit realtime measurement mode. Tap Max or Avg value to reset it. Select mode (inside/outside) at the bottom and cam to use for calculations (front or back). Illuminance is a measure of how much luminous flux is spread over a given area. One can think of luminous flux (measured in lumens) as a measure of the total "amount" of visible light present, and the illuminance as a measure of the intensity of illumination on a surface. A given amount of light will illuminate a surface more dimly if it is spread over a larger area, so illuminance (lux) is inversely proportional to area when the luminous flux (lumens) is held constant. One lux is equal to one lumen per square metre: 1 lux = 1 lm/m2 = 1 cd·sr/m2 A flux of 1000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1000 lux. However, the same 1000 lumens, spread out over ten square metres, produces a dimmer illuminance of only 100 lux. Achieving an illuminance of 500 lux might be possible in a home kitchen with a single fluorescent light fixture with an output of 12000 lumens. To light a factory floor with dozens of times the area of the kitchen would require dozens of such fixtures. Thus, lighting a larger area to the same level of lux requires a greater number of lumens. As with other SI units, SI prefixes can be used, for example a kilolux (klx) is 1000 lux.

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Light ale nie Meter Mało dokładny. Szkoda kasy.