Discover STEM | Petrosains, The Discovery Centre

Light Pollution

Artificial Light Contamination / Excessive Artificial Light / Lux Pollution

The technology of lighting has been developed to give light a meaning, transforming spaces by giving them a lit atmosphere and to give beauty to a scene.

But the use of light now is challenging us..

Many lighting applications and the electricity used to create it, aren’t focusing onto the actual objects and the areas where people want it lit but is being wasted by spilling it into the sky.

The threat of LIGHT POLLUTION continues to grow as the demand for artificial light increases each year.

Many of us may be aware of water, air and even sound pollution.

But did you realize that LIGHT CAN CAUSE POLLUTION
Fact is we either don’t know or don’t understand much about light pollution and the negative impacts of artificial light at night brings to the environment.

What is Light Pollution?

It is the excessive, misdirected or invasive use of artificial light which are also known as photo pollution or luminous pollution.

Light Trespass

  • Known as spill light.
  • Light that is cast where it is not wanted or needed.


  • Visual impairment that occurs when the light source being brighter than our eyes are used to.

Sky Glow

  • Brightening parts or the whole night sky.

Light Clutter

How Bad is Light Pollution?

With much of the Earth’s population living under light-polluted skies, over lighting is a universal concern as it causes and environmental hazard on a global scale.

The Effects of Light Pollution

Harming Human Health

Circadian rhythms is disrupted can result in variety of health problems; including sleep disorders, anxiety, depression, diabetes, cardiovascular disease, obesity and others.

Increasing Energy Consumption

The total amount of wasted electrical energy each year is enough to illuminate over 11 million homes and power over 777,000 cars.


The artificial light increase the chemicals for ozone pollution by 5%.

Astronomy Research

Causes interferes with atronomical equipment; makes viewing difficult even with the aid of a telescope.

Disrupting Ecosystem and Wildlife

Feeding, sleeping, mating, and migration cycles of all wildlife are disrupted too.

How can we prevent or reduce light pollution?

Just being aware that light pollution is a problem is not enough; the need is for us to MAKE AN ACTION!

You can start by minimizing the light usage from your own home at night by simply following these simple steps.

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