Just be mindfull that any of the DOT Safety lights have requirements on both the lenses and the installed location of lights... There will be a DOT number stamped into the lens. Backup lights general have to come ON only when you are in reverse and not from a toggle switch on your dash somewhere...
I would check with the local DOT/DMV guys and see if what you are purchasing and doing will pass safety inspection...
I installed some lights once and had to remove them to be able to pass safety inspection...
Roy Ken