To paint light fixtures, you will need paint. Paint is a viscous liquid mixture that is used to coat or color surfaces. It is available in different colors and shades, and can be transparent or opaque depending on the properties of the paints. Commonly used paint types are oils, acrylics, enamels, etc.  You can even buy paint online. Acrylic paints are popular because they are water based. You can easily clean up with water after the paint dries. Also, acrylics work perfectly well with metal, plastic and glass. The best type of paint to use is the one that will be serving as the protection for your light fixtures. So if you desire to paint the light fixtures for aesthetics, choose the color you want, get the required amount and start painting.