We need: lightbulbs, dish liquid, and paper towels.
The astronauts saw the details of the moon: craters, valleys, and a barren landscape.
Explanation:
A colon should only be used if the sentence before the colon is an independent and complete thought. The colon should be able to be replaced by a period and the information after the colon removed. Colons do not follow a signal phrase such as "following".
