Emma,
It does work. But too much of a good thing can be bad. Care must be taken to check medications for precautions. Some are photosensitive. Sun screen should also be applied.
I agree that sun exposure lifts the spirits. Heck, they market lights for those who live in drab, overcast places to help relieve depression. I enjoy it so long as the temperature is comfortable. I live in Florida and it gets way too hot for me in the summer.
Penny