Write the next sentence in this paragraph:

How to hang pergola lights
Purchase lights made for outdoor use.
Commercial grade string lights will have thicker wires and waterproof sockets. These lights can be hung year-round and will survive through all seasons.

Options are: I. Check the packaging of the lights to ensure they are safe outside. Led lights won't cause damage to nearby greenery, unlike incandescent bulbs.; II. Buying at craft fairs and other sporting events are definitely a no. If you're hanging pergola lights indoors, look for ones that have a cable connection so that the lights can connect to the poles at the ends.; III. You can also get those at most hardware and home improvement stores. Buy your strings from an outdoor lighting company or online.; IV. Some hanging hardware stores sell them specifically for indoor lighting. You will need a galvanized hook at an outdoor hanging hardware store.;
I.