Check what should you do if you want to be exposed to sunlight and the weather is clear...

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Choose date and time
Choose altitude in meters

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How long you can stand under direct sun rays and what type protective lotion you should use

The index of biologicaly active UV-radiation in clear sky conditions is calculated by the average model for Bulgaria by the set date and time. Based on this index the permissible time for staying in direct sunlight without protection it is calculated, according the above given skin type altitude and conditions for reflection: snow, sand, water. We propose an minimum acceptable factor of sun protective lotion, allowing safe stay of two hours.

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