The day the light bulb was invented – level 2


The first experiments with electric light were made in the early 19th century. It was the time when Humphry Davy from England discovered that when electricity passed through a piece of platinum, it started to shine.

Yet it took 50 more years for scientists to make a light bulb which could shine longer. They needed to find the right material for the inner part of the bulb.

That was the challenge that Thomas Edison and his team of scientists accepted. His team made thousands of tests. They were working day and night.

On October 21, 1879, Edison made a new type of light bulb. This bulb was shining for 13 and a half hours.

The newspapers didn’t write about anything else and called this discovery Edison’s triumph of life. However, for Edison, it wasn’t a success. He wanted a light bulb which could shine much longer. That’s why his team did thousands of other tests.

Then they discovered that a material from bamboo could shine up to a thousand hours. After that, light bulbs flooded the world.

Difficult words: discover (see something new), platinum (a silver-grey metal), inner (the inside), call (give name), bamboo (a tall plant which is used for furniture), flood (go everywhere).

What other materials do you think scientists tested before discovering bamboo as the key component for the light bulb?


Days in Levels is designed to teach you 3000 words in English. Please follow the instructions

How to improve your English with Days in Levels: 


  1. Do the test at Test Languages.
  2. Go to your level. Go to Level 1 if you know 1-1000 words. Go to Level 2 if you know 1000-2000 words. Go to Level 3 if you know 2000-3000 words.


  1. Read two new articles article at Days in Levels every day.
  2. Read one previous article too and check if you remember all new words.


  1. Listen to the new article and read the text at the same time.
  2. Listen to the new article without reading the text.


  1. Answer the question under the new article and write your answer in the comments.


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