Light pollution is caused by inefficient or unnecessary use of artificial light. Specific categories of light pollution include light trespass, over-illumination, glare, light clutter, and skyglow. A single offending light source often falls into more than one of these categories.Click to see full answer. Hereof, what is light pollution and its causes effects and prevention?Light pollution is excessive, misdirected or inappropriate outdoor lighting. Too much of light pollution washes out view of the Universe, result in increase in the energy consumption, interferes with astronomical research, disrupts ecosystems, affects the health and safety of humans and wildlife.Subsequently, question is, what are the negative effects of light pollution? Light pollution: Any adverse effect of artificial light including sky glow, glare, light trespass, light clutter, decreased visibility at night, and energy waste. Light pollution is not only a hinderance to astronomy, but it also impacts us directly. Secondly, what is light pollution examples? Glare, which bright light that causes visual discomfort. Skyglow, which is the artificial glowing of the sky from too many lights. Light trespass, which can be described as unwanted light; the lights from a neighbor’s floodlight shining in your bedroom, could be seen as an example of light trespass.How did light pollution start?A: Light pollution started to become a problem in the early 20th century, around the time cities began adopting electric lighting. Another way to reduce light pollution is to make sure that the light is only illuminating what needs to be illuminated. Putting a shade on a lamp would be an example.