Douglas Cootey is replacing his lightbulbs with brighter ones, but not just to see better. The new broad spectrum lights simulate sunlight, andmight help enliven his mood in the gloomy winter months.

Cootey, a stay-at-home dad in Salt Lake City, Utah, has struggled with depression for 16 years and shares his story with others on his blog, The Splintered Mind.

He said he started to notice last year that his depression was harder to manage in the winter. His challenge, he told CNN, is "keeping a positive and upbeat attitude in the face of a chemical onslaught induced by winter."

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