Lasers, LEDs and light sources are devices that create light. LEDs (light emitting diodes) convert an electrical current into light using spontaneous emission in optically active semiconductors.

Natural light, derived from the sun, infuses spaces with invigorating 'chi,' while strategically placed artificial light sources, like lamps and candles, maintain balance when sunlight is absent.

So where does gender come into play? Of the men who responded to this survey, they noted twice as much disruption from natural light sources (for example, the sun) than women. Dr Tang theorizes ...

Dark wood cabinets and dark finishes can make a room feel, well, dark, regardless of your natural light sources. Updating ...