# How Many Hours Must Bulbs Burn to Save $73 Million Annually? • theone In summary, an advertisement claims that replacing one 60W incandescent bulb with a 13W fluorescent bulb can result in annual savings of 73 million dollars for each Canadian household. To achieve this, the replacement and original light bulb must be left switched on for a certain number of hours per day, on average over the year. This question is based on the assumption that there are 13.3 million residential households in Canada and the average cost of electricity is 8.0 cents per kW-hr. theone ## Homework Statement An advertisement claims a total annual savings in electricity worth 73 million dollars for each Canadian household replacing one 60W incandescent bulb with an equivalent 13W fluorescent bulb. If the typical total cost of electricity (averaged across Canada) is 8.0 cents per kW-hr, how many hours per day must the replacement and original light bulb be left switched on (on average over the year)?Use the following assumptions: there are 13.3 million residential households in Canada ## Homework Equations ## The Attempt at a Solution I need some help understanding the question: "how many hours per day must the replacement and original light bulb be left switched on (on average over the year)?" ... in order to achieve what? theone said: ## Homework Statement An advertisement claims a total annual savings in electricity worth 73 million dollars for each Canadian household replacing one 60W incandescent bulb with an equivalent 13W fluorescent bulb. If the typical total cost of electricity (averaged across Canada) is 8.0 cents per kW-hr, how many hours per day must the replacement and original light bulb be left switched on (on average over the year)?Use the following assumptions: there are 13.3 million residential households in Canada ## Homework Equations ## The Attempt at a Solution I need some help understanding the question: "how many hours per day must the replacement and original light bulb be left switched on (on average over the year)?" ... in order to achieve what? In order that powering the lower wattage bulb will cost$73mil less than for powering the higher wattage bulb----for the same number of hours.

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## 1. How can I save energy at home?

There are several ways to save energy at home, such as using energy-efficient appliances, turning off lights and electronics when not in use, and properly insulating your home to reduce heating and cooling costs.

## 2. What are some simple tips for reducing energy consumption?

Some simple tips for reducing energy consumption include using natural light whenever possible, unplugging chargers and appliances when not in use, and adjusting your thermostat to use less energy.

## 3. Can I save energy by using renewable sources?

Yes, you can save energy by using renewable sources such as solar panels, wind turbines, and geothermal energy. These sources generate electricity without relying on fossil fuels, reducing your carbon footprint and energy costs in the long run.

## 4. How does weather affect energy savings?

Weather can have a significant impact on energy savings. For example, during hot summer months, using a ceiling fan instead of an air conditioner can save energy and money. In colder months, sealing drafts and properly insulating your home can also help reduce energy consumption.

## 5. Is it worth investing in energy-saving technology?

Investing in energy-saving technology, such as smart thermostats and LED lights, can have a significant impact on your energy savings in the long run. While the upfront cost may be higher, the energy and cost savings over time make it a worthwhile investment.

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