A simple cardboard can go a long way, because as with all art projects, all you need is your imagination. This one is quite an interesting piece; the different colors seem to work not just for the lighting fixture, but for the entire room. Also, you can make something like this with different colors and styles.
As with cardboards, there are also infinite ways to use paper for lighting fixture. This one is a good example of a simple, yet elegant light piece. You can add a light switch light level control for a dim lighting effect to complete the cozy mood, and full light to illuminate the entire room.
Don’t throw away those tetra boxes from your food and drinks. Check out this link and learn how to use them for a beautiful pendant light. As you can see, the end result doesn’t look anywhere close to a recycled material at all.