7 exciting facts about light

The efficiency with which fireflies produce their light is 95 percent . No artificial light source can do this. Fireflies convert 95% of the energy they use into light. For comparison: The efficiency of LEDs is up to 40%, the rest is “lost” as heat.

The green alga Chlamydomonas only needs 30 microseconds to react to light. This means it can perceive light much faster than the human eye. Your “eye” is a light-sensitive molecule. When exposed to sunlight, it directly triggers a stream of positively charged particles and thus an ultra-fast reaction.

Over 24.7 million RGB LEDs light up in the largest digital advertising space in the world. The mega display in Times Square in New York has 1,581 square meters of illuminated area and is eight stories high.

It takes around 8 minutes and 17 seconds for light to travel from the sun to the earth. This period of time is required because the Earth is around 149.6 million kilometers from the Sun.

The longest burning lamp in the world is an old lamp in the California Fire Department. It has burned continuously since 1901.

Despite the name, black holes are actually the brightest objects in the universe .

It was important to humans to generate their own light from a very early age. Since the sun, our main source of light, naturally only shines during the day, Stone Age people built fires around 500,000 years ago to protect themselves and warm themselves, but also to illuminate their environment.