Fairy lights can also be used year round too. For best results when buying, the lights should resemble a grain of rice. You can get "warm white light" (for indoors) or "cool white light" (outdoors), or get all kinds of colors. The lights come in different colors of wire as well....Silver, copper and more! Fairy lights are either battery operated, or come with a wall plug. If you pay more than $4.00-$10.00 per strand, you're paying too much.