1. Launch the "Light It On" game on your mobile device.

2. Tap the screen to begin the first level.

3. Observe the lights presented on the screen. Each level will show a different arrangement of lights that are either on or off.

4. Your goal is to match the light pattern to the required configuration shown at the beginning of the level.

5. Tap on a light to change its state. Some lights may toggle adjacent lights as well, depending on the level's mechanics.

6. Use logic to determine which lights to tap and in what order to achieve the target configuration.

7. Pay attention to how each tap affects other lights. Some levels require careful planning to solve.

8. Complete the level by successfully turning on or off the correct combination of lights.

9. Progress to the next level, which will introduce more complex puzzles and new challenges.

10. If you make a mistake, you can reset the level or undo moves depending on the game’s options.

11. Use as few moves as possible to earn higher ratings or stars for each level.

12. Continue playing through the levels to improve your puzzle-solving skills and challenge your brain.

13. Turn off or on all lights as required and become a master at saving energy in a fun and creative way.