如果你不能外出，或者你居住得足够远，远到一天仅有几小时甚至没有白昼的北部地区，那么你可以使用全光谱的探照灯，光线或者白色墙壁模式或者是充满生气的重色调色彩来保持光亮。
If you can't, or if you're so far north as to have little or no daylight, use full-spectrum lights, light or white walls, and perhaps some vibrant accent colors.
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