WHAT DOES MEASURING LIGHT IN CONCRETE MEAN?
The first quantity that can be quantified is the energy emitted by light sources and / or devices. To do this, in our laboratories there is an Ulbricht sphere, with a radius of 1m, which allows to measure the luminous flux in lumen [lm] emitted by the object under test. Another quantity that can be measured with our photocells, both fixed and mobile, is the illuminance in lux [lx], which expresses the amount of luminous flux produced that affects a given surface.
Furthermore, we are able to measure the luminous intensity in candelas [cd], that is, the amount of luminous flux that propagates in a given direction within a given solid angle.
Thanks to portable luminance meters, it is possible to measure the luminance in nit [cd / m2] of the device, which corresponds to the amount of flux emitted by a given surface in a specific observation direction.
Finally, the photometric equipment is completed by the colorimeters with which the trichromatic coordinates of the light emitted can be determined and, therefore, the correct color can be verified with respect to an application or a specific customer. With these instruments we can also measure the color temperature in Kelvin [K].
This parameter is of great interest in civil lighting, because it helps to define what atmosphere can be created with a particular source.