Incandescent and energy saving lamps which are good for eyes
High color temperature is good for concentration, but dazzling
Low color temperature of the negative concentration of the spirit of reading, the lamp from the people more than 1.5 meters,
Energy-saving lamps, color rendering index of 80 or more, it has a variety of color temperature. Reading, I recommend using 4000K
Color rendering index of 99 or more, by contrast, it is the best eyes,
Three kinds of lights, incandescent light color of the best,
