The term ‘photobiological risk’ refers to the potential of light, particularly at the extreme ends of the visible spectrum, to harm the eye. At the blue end of the spectrum we are concerned with the harmful effects of ultra-violet light, while at the red end of the spectrum we are looking for harmful infra-red light.
In consideration of the hazards posed to skin and eye, three exposure scenarios are taken into account: exposure of the skin, exposure of the front surface of the eye (cornea, conjunctiva and lens) and exposure of the retina at the back of the eye.
EN 62471-2008 is a standard that deals with photobiological risk. Due to the potentially serious nature of this hazard, third party tests are required to determine which ‘risk group’ products should be classified into.
Risk Group 0
Luminaires present no photobiological hazard
Risk Group 1
Luminaires present no hazard due to the normal behavioural limitations of a person when exposed to a light source.
Risk Group 2
Luminaires present no hazard due to people’s aversion response to very bright light sources, or due to thermal discomfort.
Risk Group 3
Luminaires that fall within this risk group cannot be used in general lighting service.
Through careful selection of the LED and the phosphor coating used it is possible to eliminate the harmful light from an LED light source. Reggiani is committed to eliminating this risk and as a result of very careful selection and test procedures all of our luminaires fall into Risk Group 0 and pose no photobiological hazard.