Ideal Conditions for Light Meters
Do you often use intuition to judge the brightness of a light source? Or use the same method to judge which of similar products is brighter? Do you know how big the possible difference is? Is the light distribution of a lamp consistent with the original design, I think everyone must also be very concerned; as a pioneer in the lighting industry, you and I should really make good use of this lighting tool - the illuminance meter. Faced with many different brands of illuminance meters, the gap between their quality and price is also very wide. How to make an appropriate choice is often a headache. Here is a simple explanation:
An ideal lux meter should have the following conditions:
● Compact Size, Light Weight
The opportunity to use the illuminance meter is very wide, and the timing of use is often in different places, so the portable light meter is small in size and light in weight. The absolute prerequisites for the illuminance meter.
● Accuracy
Whether the illuminance meter is good or not has a great relationship with its accuracy. Of course, it is also closely related to its price, so it is necessary to buy a lux meter with high accuracy at a reasonable price. Generally, the error should not exceed ±15%.
● Color Compensation
The types of light sources are all-encompassing, some focus on red high-voltage lamps with longer wavelengths, or blue-purple series such as Daylight fluorescent lamps with shorter wavelengths; there are also more evenly distributed ones such as incandescent bulb series, the sensitivity of the same illuminance meter to different wavelengths may be slightly different Therefore, appropriate compensation is necessary.
●Cosine Compensation
We all know that the brightness of the illuminated surface is related to the incident angle of the light source. In the same way, when measuring with a light meter, the incident angle between the sensor (Sensor) and the light source will naturally affect the reading value of the light meter. Therefore, whether a good illuminance meter has the function of cosine compensation cannot be ignored.
