Comparison of Incandescents to Compact Fluorescents
| 25-Watt Compact Fluorescent | 100-Watt Incandescent | |
|---|---|---|
| Cost of Lamps | $3.40 | $0.60 |
| Lamp Life | 1,667 days (4.5 years) | 167 days |
| Annual Energy Cost | $6 | $25 |
| Lamps Replaced in 4.5 years | 0 | 10 |
| Total Cost | $29 | $134 |
| Savings Over Lamp Life | $105 | 0 |
Source: Life Cycle Cost Estimate for ENERGY STAR Qualified Compact
Fluorescent Lamp(s)
U.S. Department of Energy
| Incandescent Wattage | CFL Wattage |
|---|---|
| 25 | 5 |
| 50 | 9 |
| 60 | 15 |
| 75 | 20 |
| 100 | 25 |
| 120 | 28 |
| 150 | 39 |