Do you often use intuition to judge the brightness of a light source? Or use the same method to determine which product is brighter? Do you know how much difference is possible? The light of a luminaire is consistent with the distribution of the original design. I think everyone must be very concerned. As a workman in the lighting industry, you should really make good use of this lighting tool - the illuminance meter. In the face of many different brands of illuminance meters, the gap between quality and price is also very different, how to make appropriate choices is often a headache. Here is a simple explanation: an ideal illuminometer should have the following conditions: ◠Compact size, light weight (Compact Size, Light Weight) The illuminance meter has a wide range of opportunities, and the timing is often used in different places. The portable pre-requisite is small and light weight is the prerequisite for the illuminometer. ◠Accuracy The quality of the illuminometer is absolutely related to its accuracy. Of course, it is also closely related to its price. Therefore, it is necessary to buy a higher-accuracy illuminance meter at a reasonable price. Generally, the error is not more than ±15%. ◠Color Compensation The types of light sources are all-inclusive. Some are red-type high-voltage lamps with longer wavelengths, or shorter blue-violet lights such as Daylight fluorescent lamps. There are also more widely distributed incandescent bulbs. The same illuminance meter is different. The sensitivity of the wavelength may be slightly different, so moderate compensation is necessary. ◠Cosine Compensation As we all know, the brightness of the illuminated surface is related to the angle of incidence of the light source. For the same reason, when measuring with an illuminometer, the angle of incidence between the sensor and the source will naturally have an effect on the reading of the meter. So whether a good illuminometer has cosine compensation function can not be ignored.
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