Integrated approaches of research on lighting conditions at work places have been conducted by Schierz & Krueger (1995) and Fleischer (2000). Schierz & Krueger acknowledge that the stimulus-response-systems is an existing and valid approach of perception in special cases where the perception of a visual object is not relying on an existing mental concept (schema). An example in this case is visual quality inspections of products where randomly located imperfections have to be detected. Another example is the classical visual test, when a randomly oriented visual sign has to be identified. Talking about glare at the work place means that people reside in a well known environment where determined cognitive structures prevail substantially.

This implies that the definition of lighting conditions which cause discomfort for people working in this setting has to incorporate the cognitive schemata concept to reach reliable parameters to identify Discomfort Glare.

The above cited results on research outcomes on DGI confirm the need for this integration of mental structures. Though the cognitive structures vary interpersonally a strong correlation among people in similar cultural background is expected. This permits the outline of a new approach for research and definition of Discomfort Glare parameters.