Below is an 8 month lightfastness test of the set of 72 Amazon Basics Premium Colored Pencils. They are wax-based, so they are not soluble with water.
The left strips of the color swatches in the picture below has been laying in a dark drawer, so that is how they look when you draw with them. The two strips to the right have been exposed to sunlight for 8 months. They have been taped on the inside of a window.
Results
The colors are not lightfast, with five exceptions: nr 3, 4, 69, 70 and 72.
This means that the pencils should not be used for anything that is intended to hang on a wall, exposed to sunlight. The colors will change over time.