T. S. Wiley

T.S. Wiley is a writer who is the author of "Lights Out: Sleep, Sugar and Survival," and "Sex, Lies and Menopause." Her main thesis in "Lights Out" is that light is a physiological timer that controls endocrines such as dopamine and cortisol. With the extension of the natural day through artificial lighting, rest at the hormonal levels is rarely adequate for optimum biological needs of the body. The result is both fatigue and unnatural apetite which leads to weight gain, exhaustion and disease.

She argues that the body's responses are cyclical, reflecting the seasons of the year, and that the body's needs vary seasonally. For the six months of the year that include winter, the body needs at least nine and a half hours of sleep, and carbohydrates should be restricted as they would be naturally in the environment. During summer months, "you can live on margaritas and stay up late and have sex all day and all night" she writes in "Lights Out." Her writing style is characterized by a combination of such flippancy and thorough scientific explanations.