Also found in: Dictionary, Thesaurus, Financial, Encyclopedia, Wikipedia.


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 ?
While I know how special the village is, it is fantastic to have had this recently endorsed by Historic England - which has included Port Sunlight in its latest campaign, Irreplaceable: A History of England in 100 Places.
Sunlight Financial offers solar installers a wide range of loan products, tailored to each homeowner's preferred loan structure, tenor and interest rates.
The drawback was that it needed light 10 times stronger than sunlight.
Extracting more energy from every beam of sunlight is critical to reducing the cost of electricity generated by solar cells as it lowers the investment needed, and delivering payback faster.
Mark brings to California Sunlight a long and proven track record of growing companies, opportunities, ideas, intellectual properties, technologies, resources and people.
Sunlight said 30 posts at are being considered for redundancy in a 31-day consultation process that started on Thursday.
Sunlight has a branch in Percy Street, in Newcastle, as well as others in Heaton, Gosforth, Four Lane Ends, Whitley Bay and Low Fell.
The blue ring around Pluto is caused by sunlight scattering from haze particles common in Pluto's atmosphere; scientists believe the haze is a photochemical smog resulting from the action of sunlight on methane and other molecules, producing a complex mixture of hydrocarbons such as acetylene and ethylene.
1 SUNLIGHT exposure can affect your emotional wellbeing and help you ward off depression and stress.
Achieved at University of New South Wales (UNSW) as world's first' it converts over 40 percent of sunlight hitting the panels into electricity the highest ever efficiency of sunlight conversion into electricity says UNSW Prof.
CTI) has announced the introduction of its Sunlight Inks for decoration applications in the can manufacturing industry worldwide.
Holick ME Sunlight, ultraviolet radiation, vitamin D, and skin cancer: how much sunlight do we need?