We are all experienced and we have all done it! I am referring to one’s reaction to less than good lighting of course. Think about it.
We have all experienced architectural spaces wherein something about the lighting is not quite right. It could be any of the following issues, to name a few: appearance, color quality, controllability, emphasis or lack thereof, flicker, harshness of shadows, lack of shadows, illumination levels on horizontal and/or vertical surfaces, luminaire placement, proportions, and/or scale. Any of these issues can be perceived as bad lighting.