Update for chord management purposes we placed these along the bottom portion just above the molding along 2 walls. To clarify each roll is approximately 16 feet. Be careful peeling off the tape. We had some issues where the tape would start to pull the sticky portion off from the lights. 
I got these for my daughters birthday. She has been asking for LED lights for her room for years. I’m hoping to get them hung this weekend after I clean her walls.  Came with 2 rolls of lights, adapter and remote.