"Candelas Lumens and Lux" introduction to lighting  terms and calculations
"Candelas Lumens and Lux" introduction to lighting  terms and calculations




How to calculate Sollner, Glare and Luminance.

Soller actually does not represent glare directly, rather a path of luminance, measured in (candelas per square meter), and corresponds to how much intensity issues from a light source within a given area. When the light is shining directly into the eye, and the apparent area of the luminaire is low and the intensity is high, you experience glare. Bright car headlights and badly placed floodlights at sports grounds are example of glare.

The Sollner diagram can be used to give an idea of the "glare" of a single luminaire:

Sollner Glare Diagram

It is a graph of the luminance of a luminaire on the x axis with angles on the y axis. See some fully detailed Sollner diagrams here .

Here is a luminance diagram example:

Glare Diagram and Table

For more on Luminance click here. Chapter 5 of "Candelas Lumens and Lux" goes into more detail about the relationship between glare, luminance, apparent area, etc:

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