Question

Which of the two is more energy efficient : filament type electric bulb or CFL ? Why ?

Answer 1

For example, a correct replacement for a 60w incandescent bulb would be a 15 watt CFL bulb (60 * 1/4 = 15). While the math for the CFL bulbs is simple, the LED bulbs are even more energy-efficient and durable than compact fluorescent light bulbs. LEDs require less wattage than CFL for the same amount of light