The lights can be used indoors or outdoors and have a long length of cable, so you can use them for your house along the roof or even on your garden fence or in your house, anywhere you like.. These lights are really beautiful and give off a great seasonal feel. Decorate buildings, ornaments, walls, and garden features, as well as trees, windows, and door frames. This will really make your house stand out from the rest. Compared to the traditional led string lights, there are 8 modes in it so you can choose whatever you like.. 8 Modes: combination, in wave, sequential, slow fade, twinkle sequential, 4 lights (slow fade, twinkle/flash, steady on)