Abstract: Ultraviolet light poses both health benefits and health risks. A method, device and computer storage program balances the health risks and benefits of ultraviolet light exposure with personal sensitivities and preferences for these health risks and benefits. An ultraviolet light exposure level of a subject person is estimated by monitoring data from a plurality of sources. A personal sensitivity to ultraviolet light exposure is also estimated from data from various sources. A recommendation for the subject person is generated based upon the estimated risks and benefits of ultraviolet light exposure.