Rather than logos, have participants use a famous tag line or marketing slogan. Break the group into small teams of four to six members. Have the team choose a logo that best represents them. Alternatively, choose a logo that best represents the project or the whole work group they belong to.
Your body makes vitamin D when your skin is exposed to the ultraviolet B (UVB) rays in sunlight. About 5 to 30 minutes of exposure to the skin on your face, arms, back or legs (without sunscreen) two times every week is enough. But, too much exposure to sunlight is a risk for skin cancer, so you should use sunscreen after a few minutes in the sun, even on hazy or cloudy days.
As everybody knows the amount of sunlight varies seasonally, both in intensity and duration. Summer brings long days and at any given time of day, the sun is higher in the sky and hence more powerful than in winter. The maximum sunlight intensity on a bright summer day may be around 1400 W/m2 whereas it may be less than half that amount in winter. In any given year, monthly sunshine hours and hence PV output will vary, but on average output dips in winter and rises in summer.