LED节能计算器
使用LED节能计算器评估从传统灯泡升级到LED照明的经济效益。比较功率和使用寿命差异，计算年度省电kWh、节省电费金额和投资回收时间。
年储蓄额
279.22 USD
Annual Savings vs Electricity Rate
公式
How to Calculate LED Savings
LEDs use 75-85% less energy than incandescent bulbs and 30-40% less than CFLs while lasting much longer.
Formula
Energy Saved = Bulbs * (Old Watts - LED Watts) * Hours/Day * 365 / 1,000
Cost Saved = Energy Saved * Rate per kWh
Typical Equivalents
计算示例
Replace 20 incandescent 60W bulbs with 9W LEDs, used 5 hours/day at $0.15/kWh.
- 01Old annual kWh: 20 * 60 * 5 * 365 / 1,000 = 2,190 kWh
- 02LED annual kWh: 20 * 9 * 5 * 365 / 1,000 = 328.5 kWh
- 03Energy saved: 2,190 - 328.5 = 1,861.5 kWh
- 04Annual savings: 1,861.5 * $0.15 = $279.23
常见问题
How long do LED bulbs last?
LED bulbs typically last 25,000-50,000 hours compared to 1,000 hours for incandescents and 8,000-10,000 for CFLs. At 5 hours/day, an LED lasts 13-27 years.
Are LEDs worth the higher upfront cost?
Yes. LED bulbs cost $2-5 each and save $5-10 per year per bulb in electricity. They pay for themselves in a few months and last years longer.
Do LEDs work with dimmer switches?
Most LEDs are dimmable, but you need to check the label. Dimmable LEDs require compatible dimmer switches designed for LED loads.