The purpose of the present opinion is to update the conclusions of the SCENIHR opinion on Light Sensitivity as appropriate and to carry out an analysis of a wider range of lighting technologies and of associated potential health risks. In addition, if available data do not allow such analysis, the SCENIHR is asked to identify relevant research needs. The opinion is based on a scientific rationale which has taken into account the relevant scientific literature and other accessible and reliable information on physical and technical characteristics of lighting technologies, principles of optical... radiation, as well as biological and health effects of optical radiation. Health effects due to optical radiation have been considered both for the general population and for persons with photosensitive or other pathological conditions. Since the assignment also includes evaluation of possible health effects of various types of lighting technologies, additional data regarding lamp emissions were requested and some were obtained from stakeholders. In addition, for assessment purposes, data regarding exposure patterns were sought, but found to be virtually lacking.