Fluorescent Lamp Energy Calculator (Cost and kWh Usage)

Fluorescent lamps are popular light bulbs that have become the go-to choice for many households and businesses. They use a relatively small amount of energy and are therefore known for their energy efficiency. However, one of the most important factors to consider when selecting a light bulb is its energy consumption and costs of usage. In this article, we will explore the energy consumption and costs of using a fluorescent lamp and provide some money-saving tips to help reduce your energy expenses.


How To Use This Calculator

Using this energy calculator is a simple and will help you determine the costs of running your appliance. Click on ‘Calculate’ to use the predefined values, or enter your daily usage in hours, appliance watts, and your current energy costs in dollars. The calculator will provide you with the daily, monthly, and yearly results. It’s important to ensure the accuracy of the information entered to get the most accurate results.

Hours Used Per Day

Enter the number of hours you estimate the appliance will be on throughout the day. To use fractions of an hour please use a decimal point in the form.

For example: 1 hour and 30 mintes would be 1.5, and 3 hours and 15 minutes would be 3.25

Power Used in Watts

The calculator already includes a default average wattage. If your appliance uses a different wattage then enter it in the calculator.

Your Energy Rate in kWh

The calculator includes an average energy rate (price in $/kWh) to use for the calculation. This may not be the exact price that you’re currently paying for electricity. If you know your energy rate please enter your price per kilowatt-hour.

Energy Consumption

Energy consumption is an essential factor to consider when choosing any electrical appliance, including a fluorescent lamp. It refers to the power or amount of electricity that an appliance uses; the higher the power or watts, the higher the energy consumed. A 28W fluorescent lamp is energy efficient and consumes less electricity than other types of light bulbs. For instance, a 60w bulb consumes more than twice the power of a fluorescent lamp, making the fluorescent lamp the more cost-effective option in the long run.

Importance of energy-efficient lighting

The importance of using energy-efficient lighting, such as fluorescent lamps, cannot be overstated. The world has an ever-growing demand for energy, and using energy-efficient appliances and technology is one way to reduce energy consumption and cost. Besides, energy-efficient lighting helps to reduce greenhouse gas emissions, which contribute to global warming and climate change.

Cost in Dollars of Energy Usage

The cost of energy consumption is a crucial factor to consider when using any electrical appliance. In the United States, the average cost of electricity is $0.12 per kilowatt-hour (kWh). To calculate the cost of running a 28-watt fluorescent bulb, multiply 28 by the number of hours the lamp is used and then multiply by the cost of electricity in your area. For example, if you use a fluorescent lamp for 5 hours per day, the daily cost would be:

28 watts * 5 hours * $0.12/kWh = $0.02/day

To determine the monthly cost, multiply the daily cost by the number of days in a month, and for the yearly cost, multiply the monthly cost by 12. Therefore, the monthly and yearly costs for running a fluorescent lamp for five hours a day are:

  • Monthly cost: $0.02/day * 30 days = $0.50/month
  • Yearly cost: $0.50/month * 12 months = $6.00/year

Money Saving Tips

There are many ways to save money and reduce energy consumption when using fluorescent lamps. Here are some money-saving tips:

  • Use natural light: Take advantage of natural light during the day and only turn on fluorescent lamps when necessary.
  • Turn off the lights when leaving the room: This is a simple yet effective way to conserve energy and save money.
  • Use energy-efficient bulbs: Consider switching to energy-efficient bulbs; they use less energy and last longer than traditional bulbs.
  • Use dimmer switches: Dimmer switches can help reduce energy usage by allowing you to adjust the brightness of the lamp to suit your needs.
  • Keep lamps and bulbs clean: Dirty lamps and bulbs can reduce the amount of light emitted, forcing you to use more lamps in a room. Regular cleaning can help keep the lamps functioning optimally.


Fluorescent lamps are energy-efficient and cost-effective lighting options. By understanding energy consumption and costs associated with using these types of lamps, you can make informed decisions on how to optimize their usage for your needs. By following the money-saving tips mentioned above, you can reduce energy consumption and save money on your electricity bill.

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