As a longarm quilter I use the large 6,000 yard cones of quilting thread. I keep these on the large thread holders (wooden pegs) placed on top of wooden bookcases along a wall in my quilting studio. I have positioned tape on the bookcases in front of the legs of the thread holders to keep them from slipping off onto the floor. I have placed very thin plastic cut from dry cleaning bags just behind the thread holders and draped over the top and down the front to keep dust of the thread. I can easily see the colors of each cone thru the plastic. For my extra cones that are still in their plastic bags, I keep on the shelfs below. I have done this for the last 20 years, works very well for me, and I find that the thread has never faded from the artificial light (basement quilting studio).