A light bulb is rated at 60 watts and is used for 5 hours a day. If the cost of electricity is $0.12 per kilowatt-hour, how much does it cost to run the bulb for a month (30 days)?

Mon, 04 May 2026 05:53:04 +0000

**How Much Does It Really Cost to Run a 60-Watt Light Bulb for a Month?** Ever wondered how much a standard 60-watt bulb adds to your monthly electricity bill? With energy prices fluctuating and efficiency concerns rising, many Americans are asking: “If mine runs 5 hours a day and costs $0.12 per kilowatt-hour, how much am I really spending?” This is more than a simple math question—it reflects how everyday choices add up financially in today’s energy landscape. Understanding these costs helps households plan smarter and budget confidently. ### The Facts Behind the Monthly Cost A light bulb rated at 60 watts, used 5 hours daily, consumes 300 watt-hours each day. Over 30 days, that totals 9,000 watt-hours—or 9 kilowatt-hours (kWh). At a utility rate of $0.12 per kWh, running the bulb for a full month costs $1.08. This straightforward calculation explains why energy-conscious users focus on efficient lighting: small daily habits compound significantly over time.