I thought the above is just another one of those email forward  junks.  However, this piece of news (International Reporter)  may worth a second look:

Washington, 19th June – Sleeping in light particularly for women is risky of developing breast cancer. The scientists say that women who sleep with the light on or stay up late at night could carry a greater risk of breast cancer.

In fact, exposure to artificial light could be cancerous. Even night shift female workers could carry this risk since light at night can disrupt crucial hormones and raise the chance of developing breast tumors.

The study by American scientists showed that exposure at night to artificial light stimulated the growth of human breast tumours by suppressing the levels of the key hormone melatonin.

Melatonin is secreted by the pineal gland at night – and helps to regulate a person’s sleeping and waking cycles. Light, however, stops the body from producing it, making the body think that it is daytime. The researchers proved the theory by grafting human breast cancer tumours on to rats.

Blood samples from women were then pumped through the developing tumours.
The blood had been collected under three different conditions – during the day, in the early hours of the morning and after being exposed to light at night.
Researchers found that the blood taken in darkness slowed the growth of the cancers by 80 per cent. 

I know there is another email forward circulating out there about not putting our children to sleep with lights on.  Well, it is wise to be a little paranoid, right?

So, don’t sleep with the lights on.