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the actinic rays of direct sunlight are known to have disinfectant properties, to be instrumental in the production of vitamin D in the skin and to be the trigger mechanism in photosensitive dermatitis, squamous cell carcinoma of the eye in cattle and of the vulva in sheep and solar dermatitis.

Patient discussion about sunlight

Q. Is it possible to be allergic to sun??? I met this girl the other day that told me she is allergic to the sun. Is it actually possible???

A. Some people are sensitive to sun-light, not because of an allergic reaction but because of different conditions or diseases that involve this symptom. Some of these reactions may be similar to an allergic reaction because the skin gets irritated, however biochemically it does not involve the same mechanism as an allergic reaction. The sensetivity to sun an immunologic and sometimes auto-immunologic symptom.

Q. What roll does the sun have in causing cancer

A. Hi again:

This is a book for everybody here:
Read it and learn to understand why you are fooled day by day!

Q. I feel some effects due to less exposure to sunlight. I heard that UV lighting is effective for depression. I’m living in northwest pacific; the summers are very nice but way to short. I feel some effects due to less exposure to sunlight. I have been told that sun light helps the production of the chemical in the brain that we are deficient of. If true, are there certain types of fixtures and/or bulbs that I should try.

A. Its also called seasonal affective disorder:

(SAD) depression with fatigue, lethargy, oversleeping, overeating, and carbohydrate craving recurring cyclically during specific seasons, most commonly the winter months.

I would about UV. Perhaps you should get a fluorescent light fixture for the area where you spend the most time each day and turn it on.

The web sites that sell the commercial light boxes want several hundred dollars or even more. (Seems like rip off to me.)
The web page at

says "studies suggest that regular fluorescent lights will work as well. UV (ultraviolet) light can damage eyes and skin, so it must be filtered out. It is best to buy a commercially built light box to be sure of the exact amount of light and to be sure that there are no isolated "hot spots" which could damage eyes. Many people still prefer full spectrum (minus UV) light because it i

More discussions about sunlight
References in periodicals archive ?
But, nearly all of this year's projects used natural lighting in workspaces as part of the architectural solution, each in a different way and for a different purpose.
The signs "show all the recycled material and some of the things done to save energy, including natural lighting and how it takes place," says Principal Dale Fox.
Typically most of these projects employ dimmer switches for lighting, use passive solar energy technology and utilize natural lighting and ventilation wherever possible.
The savings from using natural lighting can be significant, depending, of course, on the time of year and the store's location.
In Dallas, architect Betsy Pettit and engineer Joe Lstiburek designed a 12-house development, "Esperanza del Sol," with 1,270-square-foot, three-bedroom homes that maximize winter solar gain and natural lighting, shading and ventilation.
Day-Brite Lighting introduces the Attune family of fluorescent lighting products combining high quality, upscale architectural aesthetics, energy efficiency and natural lighting for a wide variety of preferences and requirements in commercial applications, including offices, schools and retail spaces.
By 2020, these connections are expected to accommodate 250,000 daily commuters and visitors; natural lighting on the PATH platforms approximately 60 feet below street level.