Answer:
Small, containing light, You'll need it in the dark, It will provide that spark, and shine into the night. Will light up any pyre, 'Cause it can help make a fire.
What must be looked through in order to see?
What has ten letters and starts with gas?
When this is found in a road you are forced to make a decision.
You're currently trying to solve one
Two little holes in the side of a hill. Just as you come to the cherry-red mill.