Lighting is a key element when it comes to eliciting a certain mood, and string lights are especially great for cozy, whimsical, industrial, or festive spaces. The best indoor string lights (also known as fairy lights) will largely depend on the type of aesthetic you’re going for; bulb size, type, color, and warmth are mostly a matter of preference. Still, there are a few important factors that’ll help you narrow down your options. First, the difference between indoor lights and outdoor lights really only matters if you’re planning on using them outdoors. For the yard, you’ll need something waterproof and weatherproof, but for inside, those features are a convenience — not a necessity. Feel free to decorate with either one inside the home, the exception being solar outdoor lights; when used inside, these likely won’t get enough sunlight to power themselves. It’s also extremely important to note the length of the strand and the amount of lights you’re getting for the cost. A $12 price tag might initially seem like a good deal — until you realize the strand is 10 feet long and has barely any bulbs. Measure out your space or potential hangi...