Common sources of light in workplaces like office lights, photocopiers and computers are not affected by the regulations. However, they apply to organisations using hazardous light sources as part of their work activities. HSE guidance provides examples of safe light sources as well as sources of light that, if used inappropriately, for example, if they are placed extremely close to the eyes or skin, have the potential to cause harm but which are safe under normal conditions of use. It also sets out examples of hazardous sources of light that present a reasonably “foreseeable” risk of harming the eyes and skin of workers and where control measures are needed, as follows: