Duno what kind of lights ur talking about. But a chain from hardware store (or where ever available), if the lights need to be attached to something then attach them to a plank of wood with some staples (the nail style ones) on the other side to the lights and attach the chain to that, chains make the height of the light adjustable to.
You may have to explain your situation a little better to get a more accurate answer to what you're looking for. Cheers.