The synthesis of vitamin D in response to ultraviolet B (UVB) radiation in sunlight depends on factors such as latitude, altitude, time of year and day-time, weather, age, skin pigmentation type, clothing, and sunscreen and is influenced by environment (pollution) and lifestyle [ 11].
The euphotic zone is somewhat arbitrarily defined as extending from the surface to the depth where the light intensity is approximately 0.1 1% of surface sunlight irradiance, depending on season, latitude and degree of water turbidity.
However the intensity of natural sunlight depends mainly on the weather [40].
For fair skin types this can be achieved by exposure to 5 15 minutes of sunlight in summer, depending on latitude, just outside the most damaging period for UVB exposure (10 am–2 pm, standard time), with longer exposures required in winter and in those with more pigmented skin (Diamond et al 2005).
TROUBLE SPOTS -- Field colors change constantly, depending on sunlight, clouds and stadium lighting.
For those who were working in shifts, each shift was considered a separate job, since exposure to sunlight might vary considerably depending on the job schedule.
It should however, be considered that vitamin D serum levels, and subsequently extent of supplementation, will vary considerably depending on sunlight exposure; an observation that should be taken into account when employing it in public health intervention of T2DM.
Depending on sunlight exposure, soil conditions and other factors, nettles can grow as tall as 7 feet (2.13 m), but generally range from 2 feet (0.61 m) to 4 feet (1.22 m) in height.
It is possible that more "dark damage" may occur depending on whether sunlight is absorbed over a longer time period.
Depending on the sunlight, the battery can fully charge in two to three hours.
