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 word becomes shorter when you add two letters to it?
What can be measured but has no length, width or height?
It is something you make after you've weighed your options.
Often wandering the streets, this group of people cannot afford to be choosers.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.