Good Lighting! Good Reading!
The amount of daylight that humans get on a daily basis has an impact on our psychological, emotional and physical well-being. Nothing that man has invented can compete with the power of natural illumination to keep our minds - and our eyes - sharp and focused.
But the fact also remains that at the end of the day the sun always sets. And then we simply need to turn on the lights. There are many man-made lights – candle light, incandescents, halogens, tube lights, CFLs and LEDs.
Each of these has its strengths – the humble candle is in its element at a romantic candle lit dinner, the incandescent bulb has given out its golden glow for over a hundred years, the tube light with its white light has its place (under the sun?) and now come the LEDs.
But which of these is best for Reading or Studying or Working? Bright light or dim light? Yellow light or White light?
For Reading or Studying or Working the colour of light is not important. This is a matter of personal preference – some of us like yellow light while some of us like white light. Most important for reading or studying or working is that the light should be just sufficient - too dim a light or too bright a light is not good for the eyes. Dim lighting causes eye strain. On the other hand too much light also causes eye strain. In either situation the eyes and the mind get tired.
So then how much light is just sufficient? The table below shows that for Reading and Studying we need 500-1000 lux of light.
|Adequate LUX levels at your work areas