Color and Mood. ENERGY STAR certified bulbs are available in a wide variety of shades of white light, ranging from yellowish, to white, to bluish white light, which allows you to customize the mood of your space.
The eye detects visible light, the nerves detect infrared or heat and the skin is sensitive to ultraviolet ( tanning and sunburn ) and the lens of the eye develops cataracts in response to UV also. a human body can detect ionizing electromagnetic radiation, if he can see what his geiger counter is reading.
Like we said before, light can be characterized by its wavelength. For example, the human eye can detect light at wavelengths between 400 to 900 nanometers. That is why we call this part of the electromagnetic spectrum visible light.