Source of light

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Across
  1. 2. during moon festival
  2. 4. during camp
  3. 6. live in the deep ocean
  4. 9. reflect the sun
  5. 10. prevent car accident
  6. 12. a giant ball of hot gas
Down
  1. 1. explode in the sky
  2. 3. need batteries
  3. 5. made of wax
  4. 7. help sailors
  5. 8. help to cook
  6. 11. need oil and matches
  7. 13. in the middle of solar system