Electrical light is important because it allows people to see at night and provides a safe alternative to fire for illumination. Thomas Edison invented an improved incandescent light bulb in 1880 that could last around 1,200 hours, making electric lights practical for homes and businesses. Electrical lighting enabled companies to operate equipment and facilities 24 hours a day instead of just 12 hours, significantly increasing productivity and profits worldwide.

1. Electrical Light
What is Electrical light
and why is it so
important?

2. Electrical Light
electricity
A light source (e.g. Metal), which is enlightened through electricity

3. History of Electrical Light
Incandescent light bulb
Many inventors worked on that from 1840-1900.
Thomas Edison from Menlo Park in New Jersey invented in 1880 an
improved electric lamp.
This lamp worked for about 1'200 hours – people could sell.

4. Why is it so important?
At least half of the day, the world is
dark. So, people need light to work,
eat, talk, etc.
Fire is very dangerous and houses
can easily burn down by error.
Electric Light gives safe
possibility to enjoy life,
work and anything else.

5. Financial benefit
Thanks to a lightbulb, companies can
work in shifts for 24 hours instead
maximum 12 hours.
500 USD profit per day in 12 hours shifts
* 1’000 companies = 500’000 USD/day in
total * 365 days =
182’500’000 USD / year
more profit per year.

6. Financial benefit II
1 person * 12 hours light per day *365
days = 4’380 hours per year/person *
7’000’000’000 people =
30'660'000'000'000 hours light per year
in total.
If one bulb runs for 1'200 hours:
30'660'000'000'000 hours / 1’200 hours =
25'550'000'000 bulbs/year.
If you sell one 100 Watt bulb for 3 USD,
your revenue would be
76'665'000'000 USD / year

7. Email: oanh@evecoo.vn
Phone: 0976879170