Cost-effectiveness of LED lamps and energy-saving lamps

If our 3W LED lamp cup costs 120 yuan, the commonly used 12W energy-saving lamp on the market costs about 20 yuan.

If the 12W energy-saving lamp is on for 8 hours a day, it consumes 0.096 kWh of electricity per day, while our 3W LED lamp consumes only 0.024 kWh for 8 hours, which means 0.072 kWh is saved every day and 26.28 kWh is saved every year.

The life of LED lamp cup is more than 50,000 hours. The life of energy-saving lamp is only about 5,000 hours (only 10% of products in China can achieve this effect). In comparison, 12W energy-saving lamps need to be used twice a year.

Then a 3W LED lamp cup will save 26.28 degrees per year * 1 yuan per degree + 2 * 20 yuan per piece = 66.28 yuan compared to the 12W energy-saving lamps that everyone uses.

If you use the LED lamp cup for 8 hours a day, you can earn back the cost in two years. If the LED lamp cup has a lifespan of more than 50,000 hours, it can be used at home for about 10 years. Then the electricity and lamp costs for the next 8 years are earned.

You can imagine how much money is spent on travel expenses and lost work time to buy two 12W energy-saving lamps each year. Ordinary energy-saving lamps also contain many harmful heavy metals.