To use these tealight candles, simply place them in a suitable holder and light the wick. They're great for adding a romantic touch to weddings, parties, or any special event. When it comes to maintenance, keep them in a cool, dry place. Remember, the actual burn time can change depending on things like temperature and wind. Also, if you're shipping them to a hot area or leaving them in extreme heat, the candles may be affected. So take these factors into account when you use or store them.