Illumination & Lighting, Hazards & Controls
Illumination level may mean insufficient or excess light. In case the light is too little, the recruits in whichever firm or company cannot see properly or spot things well. This can give rise to an error or blunder occurring since hazardous situations cannot be acknowledged with an equivalent decline in a person’s response time. In case the light is excess and too much, intense and brighter light can damage receptor cells of the human eyes. Brighter and intense light can also give rise to afterimages which may obscure a persons’ visual field. To control these particular hazards, the sources of light should be well situated and positioned to reduce these effects, and to ensure there is no excess or too little light, the type of illumination preferred should bank on: whether it is not dangerous for utility; and the reason for its installation – its intended use. On top of all, a maintained luminance must be adopted corresponding to the features of the given activity, for instance, interior activities like computer work which requires moderate visual acuity, 500 lux is usually recommended.
Change in illumination level
Change in illumination level interferes with the capacity of the individuals’ eye to alter rapidly enough to allow seeing with no errors. A good instance of change in illumination level is the transition of light from brighter open-air light to shady interiors. To control this hazard, the use of daylight sensors is usually recommended.
Qualitative aspects of lighting
There are several qualitative aspects of lighting including glare which is the occurrence of intense and brighter lights in the visual fields. It is felt when certain sections of the visual field are extremely brighter in relation to the whole domain. It usually damages vision or causes severe discomfort. It can also bring about errors in insight and detection that leads into accident and can also generate afterimages because of adaptation. There are several means of controlling this hazard including indirect illumination that sends more light beams up than down leading to proper diffusion of light and minimization of glare on Televisions and PCs screens; repositioning the source of light; or employing shades on casements to regulate the quantity or the transmittance angle of sunbeams entering in the room.
Flicker of a lighting source
Flicker of a light source may cause photosensitive epilepsy. A very short contact of about 3 Hertz to 70 Hertz flicker can cause seizure in sensitive individuals, and over 100 Hertz to about 120 Hertz usually results into eye strains and severe headaches. To control these hazards, illumination and lighting industries and research institutes need to struggle hard to set up better metrics for proper control of the flicker of the light sources. In eyestrain cases, check your vision at least ones in a year as suggested by opticians; update the optician with sufficient information regarding the nature of your work for proper check up and recommendation – in computer units, think about employing computer eye glasses and confirm that the contrast and brightness of your monitor is properly set up.
The post Illumination & Lighting, Hazards & Controls
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