1, brightness: brightness refers to a point on a surface of the micro-unit area, in a given direction emitted by the luminous intensity divided by the unit projection to the same direction of the area, the unit is: cd. In the lighting system generally do not encounter the concept of brightness.
2, illumination: illumination is in a surface of the optical density, it is injected into the unit area of ＆#8203;＆#8203;the luminous flux, the unit is LX.
The definition and measurement of illumination are complex, such as average cylindrical illumination, equivalent spherical illumination, scalar illumination, etc., and their measurement conditions and calculation methods are different. In the construction and decoration works often encountered, the lighting system is also occasionally involved in the concept of illumination.
3, luminous flux:
Luminous flux refers to the light source in the unit time away from the surrounding space radiation, can cause visual energy, that is, visible light energy. It describes the effective radiation ＆#118alue of the light source, the unit is 1m (lumens).
The luminous flux of the same power lamps may be completely different, because their light efficiency is different. For example: ordinary light bulbs only 101m / watt, and metal halide lamp can reach 801m / watt.
4, color temperature:
Color temperature refers to the color of the light emitted by the light source and the black body at a certain temperature of the same light color, the black body temperature is called the color temperature of the light source, generally in Kelvin k as a unit. Such as 3200k and 5600k and so on.
High color temperature, light color is cold: low color temperature, light color warm: moderate color temperature, the light close to the white.
Natural normal sunshine, the color temperature of light is generally higher than the color temperature of artificial lamps. Usually, the color temperature of the sun is about 5600k, while the studio and the performance of the lamp with the color temperature of 3200k or so. (Hot light source).
However, the recent rise of the TV studio cold light source, is the traditional light source changes. Cold light source of high color temperature, low energy consumption, small heat, in the indoor and outdoor camera phase, the color temperature conversion is simple, natural screen, of course, cold light source of the performance requirements of the dimmer should be higher.
In the modern light control, the new generation of a channel concept. It refers to a collection of control loops on a fixture. Specifically, the function of a fixture needs to be controlled separately (eg, focusing, strobe, discoloration, etc.), and the possession of the dimmer output circuit is collectively referred to as the channel.
For example: a computer function has a aperture, color, strobe, dimming, horizontal movement of the lens, vertical movement, so they occupy the channel is 6. It can be seen that the concept of the channel or the traditional light control loop evolved, but the modern lighting is a collection of multiple channels in a unified control of the device.
Of course, the more advanced lamps, the more complex, the more action, the number of channels may be more, the higher the requirements of the lighting console. For example: a 108 light path, with a digital output of the dimmer, it wants to control the 12-channel computer lights, so that it can only control up to 9 of these lamps, how to control is the signal and address allocation.