Arrived well packaged which is something Vego does very well. There's small on/off switch on the back of the light that needs to be pressed to activate the light. The lights are held in place with magnetic force that is adequate enough to hold the light in place but easy enough to remove and fit right into the grooves on the panels. I have 3.5' x 6.5' x 17" beds and two lights on each long side is perfect for my use.