Illumination

Illumination -  lighting both within the general working environment and also in the locality of the engineer and the task he is carrying out. 
Amount of light striking a surface. 
To work safely and efficiently, proper lighting conditions is required. 
Cones in the retina of the eye require good light to resolve fine detail.
Colour vision requires adequate light to stimulate the cones. 
Inappropriate or insufficient lighting can lead to mistakes in work tasks or can increase the time required to do the work. 
 Illumination  availableability is important where the engineer needs it (i.e. both in the hangar and one the line).
Supplemental task lighting must be adequate in terms of its brightness for the task at hand, which is best judged by the engineer. 
When using task lighting, it should be placed close to the work being done,
 but should not be in the engineer’s line of sight as this will result in direct glare.
 It must also be arranged so that it does not reflect off surfaces near where the engineer is working causing indirect or reflected glare. 
Glare of either kind will be a distraction from the task and may cause mistakes.
Poor ambient illumination of work areas has been identified as a significant deficiency during the investigation of certain engineering incidents. 
It is equally important that lighting in ancillary areas, such as offices and stores, is good.

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