LEDs (Light-Emitting Diodes) are the most energy-efficient lighting option, using up to 90% less energy than traditional bulbs. They have rapidly evolved and can replace halogen bulbs, strip lighting, and outdoor lights. When choosing LEDs, consider their lifetime rating and manufacturer feedback. Common household lighting types include tungsten and halogen bulbs, which are less energy-efficient and produce significant heat. Typical wattage for these bulbs ranges from 20W to 500W, depending on the type.