First off the slot that shows the light is an actual slot. The pictures give s the impression that there is a glass or plastic bar with a light behind it. This is not the case. All the reviews will tell you two things you need to know. One, this bed is very low to the floor. The bottom of the rails are maybe a half an inch above the ground. Unless you like to literally crawl into bed I would reconsider this. The instructions are really little or no help. But it is not rocket science to put together. Caution. Place the plastic tips on to the slats before applying any of them to the bed. Having said all that. I like the bed and will be keeping it!!!!