Lighting Stroboscopic effect

The difficult task of expressing our everyday experiences of color matching often cannot be adequately defined in a color space. Extended light sources, flicker, stroboscopic effects, variable contrast backgrounds and surrounds, matte surfaces, and polished top layers such as a leaf (107) and others cannot be properly defined mathematically. Calculations that involve such parameters are only approximations of the situations they represent. Try to imagine how dull a scene would be if you only perceived instrument measured color information. 

Perception is the way in which people interpret the environment or the way in which a person believes or understands a situation. In health and safety, the perception of hazards is an important concern. Many accidents occur because people do not perceive that there is a risk. There are many common examples of this, including the use of personal protective equipment (such as hard hats) and guards on drilling machines and the washing of hands before meals. It is important to understand that when perception leads to an increased health and safety risk, it is not always caused by a conscious decision of the individual concerned. The stroboscopic effect caused by the rotation of a drill at certain speeds under fluorescent lighting will make the drill appear stationary. It is a well-known phenomenon, especially among illusionists, that people will often see what they expect to see rather than reality. Routine or repetitive tasks will reduce attention levels leading to the possibility of accidents. 

Discharge lighting may also cause a stroboscopic effect where rotating or reciprocating machinery is being used. This effect causes rotating machinery to appear stationary, and we will consider the elimination of this dangerous effect next. 

Briefly describe what we mean by the stroboscopic effect when considering a lighting scheme for an industrial environment. 

GLS lamps do not flicker because the incandescent filament produces a carrying over of the light output as the current reverses. Thus the light remains almost constant and, therefore, the stroboscopic flicker effect is not apparent. 

---