ASSIST guiding principles set out luminous efficiency lighting at night

Solid-state lighting systems and TLC2274CDR datasheet and the Technology Alliance (ASSIST) has published a new set "ASSIST recommends" series, "Outdoor Lighting: visual effects."

The series from the Rensselaer Polytechnic Institute (RenssELaer Polytechnic Institute) of the American Lighting Research Center (LRC) study prepared, describing the brightness of a uniform system, describes the application of light at night photometric performance characteristics of complex .

Human visual system is like?

In the human retina can be found in the human visual system uses two types of photoreceptors, and TLC2274CDR price and rod-shaped vertebral cells. When the rod cells in the complete darkness of the "dark vision" conditions of work, pyramidal cells are used to handle the day or "terrain" the light of the visual information.

However, a series of light referred to as "intermediary, as the (mesopic)", which is shaped and TLC2274CDR suppliers and rod-shaped cells in the vertebral joint to the visual system provides information on the place. Intermediary, as the light is usually visible at night in the outdoors, such as street lights, cars and buildings all contribute to the formation of the light.

"ASSIST recommends" series, one of the Lighting Research Center of the American director Mark Rea, he is also a Doctor of Philosophy, in his view, since the commercial photometric or based entirely on the clear light of day, as the efficiency effect, therefore, It may misjudge some of the light source for night light effect.

A uniform photometric system The proposed unified

The photometric system is a scotopic and photopic luminous efficiency function in one pass through the entire range of light to the human visual system. The system is the role of the two biggest differences between light efficiency depends on light levels.

Rea also said that "an alternative photometric system is still the commercially available light source, which can provide the same uniform light source, rather than the value of photopic and luminosity." Calculation of uniform light intensity

ASSIST publications issued grades based on light and dark as the light source to the next, as the ratio of the specific light source to provide uniform illumination intensity calculating step by step action guide.

Different combinations of light sources and light levels to produce the same, uniform light intensity, which showed equal brightness. Therefore, the system can be used as a simple way to weigh the intermediary, as the light source and light conditions, levels, helping to select the appropriate application-specific source.

ASSIST How does it work?

ASSIST is a balance between research institutions, manufacturers and government cooperation between organizations. ASSIST to identify and reduce the solid-state lighting, the main technical barriers facing the target.

"ASSIST recommends" plan for the LED lighting and LED lighting community to reliability and performance compared with other important issues such as light source technology to provide a formal proposal.