Question

All sunlight can be damaging to the eyes. The worst damage occurs between 10 A.M. and 3 P.M.

All sunlight can be damaging to the eyes so the worst damage occurs between 10 A.M. and 3 P.M.
All sunlight can be damaging to the eyes; The worst damage occurs between 10 A.M. and 3 P.M.
All sunlight can be damaging to the eyes; the worst damage occurs between 10 A.M. and 3 P.M.
All sunlight can be damaging to the eyes, the worst damage occurs between 10 A.M. and 3 P.M.