The property of light that we need to see most things is reflection.

Here's why:

* How we see: Our eyes detect light that has bounced off objects. This bouncing is called reflection.

* Light sources: We can see objects that produce their own light (like the sun or a light bulb).

* Seeing objects: For most objects, we see them because light from a source (like the sun) bounces off them and into our eyes.

Let me know if you'd like more detail about reflection or other properties of light!