Hemant uses Incandescent electric bulbs in his rooms. Despite using other electrical equipment in lesser amount, his electricity bill goes higher than his budget. Which of the following is best option he should choose to reduce his monthly power consumption?
1. He should keep using the bulb as there is no energy efficient alternative.
2. He should use fluorescent tubelights.
3. He should use compact fluorescent lamps.
4. He should use LED Bulbs.