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From Science 2.0:
Take a look at the photos from your last sun-soaked vacation: the morning light is warm and reddish while the midday sun is much hotter and blue.Now compare that happy spectrum with the monochrome lights in your home or office, which are the same all day. No wonder you felt glum after you flew home. Our biology is dependent on the variability of light through the day and through the seasons, says Gary Allen, a lighting physicist at GE. Artificial lighting is the same all day long.
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Re: Natural: LED Bulb Changes Color Like The Sun
