1. What is a Light Bulb Energy Calculator?

Definition: This calculator estimates the energy consumption of a light bulb based on its power rating and usage time.

Purpose: It helps homeowners and businesses understand electricity usage and costs associated with lighting.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E \) — Energy consumption (kilowatt-hours)
• \( P \) — Power of the bulb (watts)
• \( t \) — Time of usage (hours)

Explanation: The bulb's power is multiplied by usage time to get watt-hours, then divided by 1000 to convert to kilowatt-hours (kWh).

3. Importance of Energy Calculation

Details: Understanding energy usage helps in estimating electricity costs and making energy-efficient choices.

4. Using the Calculator

Tips: Enter the bulb's power rating in watts and the total usage time in hours. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my bulb's power rating?
A: Check the bulb's packaging or base - it's typically marked in watts (e.g., 60W, 100W).

Q2: What's the difference between watts and kilowatt-hours?
A: Watts measure power (energy per second), while kWh measures total energy consumed over time.

Q3: How can I estimate my lighting costs?
A: Multiply the kWh result by your electricity rate (cost per kWh from your utility bill).

Q4: Do LED bulbs use the same calculation?
A: Yes, but LED bulbs typically use much less power (watts) for the same light output.

Q5: Why divide by 1000?
A: Utility companies bill by kilowatt-hours (1 kWh = 1000 watt-hours), so we convert for practical use.