General Meaning:
* The sun provides us with light and warmth.
* I turned on the light to see better.
* The artist used light and shadow to create depth in the painting.
* Can you see the light at the end of the tunnel?
Specific Types of Light:
* She has beautiful blonde highlights in her hair. (referring to streaks of lighter hair color)
* He focused the spotlight on the performer. (referring to a concentrated beam of light)
* The traffic light turned red. (referring to a signal light)
Figurative Meaning:
* He brought light to the situation with his humor. (meaning he brightened the situation)
* She is a light in the darkness. (meaning she is a source of hope and guidance)
* They shed light on the problem. (meaning they helped to understand the problem)
As a Countable Noun:
* The lights in the theater were dim. (referring to multiple light sources)
* I need to buy some Christmas lights. (referring to multiple decorative lights)
As an Uncountable Noun:
* There wasn't enough light to read. (referring to the general amount of illumination)
* The light from the moon illuminated the path. (referring to the general illumination from the moon)
As you can see, "light" can be used in many different ways depending on the context.