Okay kiddo, so a Bartlett Street Lamp is a type of lamp that you might see on a street or sidewalk. It's named after a company called "Bartlett" that used to make them a long time ago.
The lamp is made up of a big pole or post, with a light bulb at the top. The light bulb is covered by a glass or plastic cover, like a little house. There's also a little container at the bottom of the pole where electricity is stored so the lamp can light up at night.
Some Bartlett Street Lamps are very fancy and have decorations on them, like scrolls or patterns. They can be really pretty to look at!
People use Bartlett Street Lamps to light up the street so that people can see where they're going at night. This keeps people safe and helps them avoid tripping or falling in the dark.