While it may seem simple, picking the right lights for your Christmas tree is almost an art. In general, you want small bulbs for a small tree and big bulbs for a big tree. When it comes to the light itself, you have two options: LED or incandescent. However, LED Christmas lights are the superior choice as they are more durable, safer, and less costly. The next thing to consider is color. A more traditional look would be all white Christmas lights. But if you like to spice things up, then multi-colored lights are the more popular choice.