The lights are fairly easy to install. I had to remove some of the heat shrink tubing in order for the wires to fit into the rain groove . Warning - when using the primer for the 3m tape - be careful when applying to silver plastic on the mirror. Only apply the width of the tape. The primer leaves a light stain on the silver plastic. I wish the warning was in the package. Most people won't notice the stain but I know it's there.