(Cleveland) -- This is the weekend that we turn our clocks back one hour, but even though many of us will get an extra hour's sleep Saturday night, that doesn't mean you'll feel better, as the lessening of daylight this time of year can cause you to have health problems.

Dr. Michael Decker, associate professor of nursing at the Frances Payne Bolton School of Nursing at Case Western Reserve University, tells WTAM that as the amount of daylight grows shorter as we approach winter, seeing less daylight can make us feel more sluggish, or only half-awake.

Decker attributes that to the fact that incandescent and fluorescent lights don't cover the full spectrum of light. They don't put out blue light, and that blue light is necessary for the brain to stay energetic and alert. He suggests using some blue lights, which are commonly available at home improvement stores in the light bulb section.

Other suggestions to keep from becoming sluggish in the winter include regular exercise, and Decker says you should also stick with regular times to wake up and go to sleep.

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