The 100 foot spool of black clip lights with 4 inch spacing is great for accenting buildings, roofs, windows, staircases or where ever a unique accent lighting is needed. The clip light can use incandescent or Led bulbs (with a 7 amp maximum run) and can be cut anywhere. The clip light requires a 12 or 24 volt step down transformer (depending on what type of bulbs used) and is sold separately.