Why Switching to LED Makes Financial Sense
LED bulbs use 80–90% less electricity than incandescent bulbs for the same brightness. Household lighting accounts for 10–15% of total electricity consumption. Switching all lights to LED can dramatically reduce the lighting portion of your electricity bill.
While LED bulbs cost more upfront (₩2,000–10,000 per bulb vs. ₩1,000–2,000 for incandescent), their lifespan is 10× longer. The total cost of ownership — purchase price plus electricity — is far lower over time. Reduced heat output is a bonus that lowers air conditioning load in summer.
Bulb Efficiency Comparison
- Incandescent: 10% light efficiency, 90% heat waste
- Halogen: Slightly better than incandescent, still inefficient
- CFL (Compact Fluorescent): ~70% savings vs. incandescent; contains mercury
- LED: Highest efficiency, mercury-free, longest lifespan
Frequently Asked Questions
Yes, but not all LED bulbs are dimmable. Look for "Dimmable" on the packaging. Dimmable LEDs cost slightly more but are compatible with standard dimmer switches.
LED bulbs should not go in general waste. Most electronics stores, large supermarkets, and community centers have collection boxes. CFL bulbs contain mercury and require special disposal.