61.   Ultraviolet light is a mixed blessing as far as living things are concerned.

62.   Whilst we stress the artificial nature of most time-cues, it would be misleading to suggest that natural light is without effect.

63.   Yet its light was undimmed and it glanced off the metal buildings as far as the eye could see.

64.   The lights were off and it was pitch-black.

65.   You can turn it off.

66.   The warning lights were clearly visible.

67.   No matter how soft the light is, it still plays havoc, fading carpets and curtains in every room.

68.   The lights were expensive to install.

69.   The lights are on, so there must be somebody at home.

70.   Early next morning, she saw a light ahead.She knew she was near the shore because the light was high up on the cliffs.