Light Fixture Energy Consumption Calculator

How to Use This Calculator

To calculate the energy consumption of your light fixtures:

1. Enter the wattage of your light fixture in the first field.
2. Select the type of light fixture from the dropdown menu.
3. Enter the number of hours you use the fixture each day.
4. Enter the cost of electricity per kilowatt-hour (kWh) in your area.
5. Click "Calculate" to see the results.

The calculator will show you the daily, monthly, and annual energy consumption in kilowatt-hours (kWh) and the estimated cost.

Formula Explained

The energy consumption is calculated using the following formula:

Where:

• Wattage is the power rating of the light fixture in watts (W).
• Hours Used per Day is the number of hours the fixture is used each day.
• Cost per kWh is the price of electricity in your area per kilowatt-hour.

Worked Example

Let's calculate the energy consumption of a 60W LED bulb used for 5 hours each day with an electricity cost of $0.15 per kWh.

1. Daily consumption: (60W × 5 hours) / 1000 = 0.3 kWh
2. Monthly consumption: 0.3 kWh × 30 = 9 kWh
3. Annual consumption: 0.3 kWh × 365 = 109.5 kWh
4. Monthly cost: 9 kWh × $0.15 = $1.35
5. Annual cost: 109.5 kWh × $0.15 = $16.42

This means the 60W LED bulb will cost approximately $1.35 per month and $16.42 per year to operate.

Energy-Saving Tips

Here are some tips to reduce your light fixture energy consumption:

• Use LED bulbs - They use significantly less energy than incandescent or fluorescent bulbs.
• Turn off lights when not in use - Even small amounts of energy add up over time.
• Use natural light during the day to reduce the need for artificial lighting.
• Install motion sensors in areas where lights are frequently turned on and off.
• Replace old fixtures with more efficient models when possible.