See through the seat and see the light to see a beautiful rainbow pattern. Makes a kaleidoscope of light. Can be used with adhesive or film If you want to use adhesion, remove from both sides with cellophane tape to remove cleanly. *Never see strong light, such as sunlight, laser pointer, etc. on the spectrum sheet. It may hurt your eyes. Note: This product allows you to see the light source diffused through the sheet (film). This product is not intended to be used directly on the light source.