An ergonomic adapter for an aerosol spray can. The ergonomic adapter has an elastomeric collar that fits around a body of an aerosol spray paint can such that a front portion of the collar is facing in front of the can just below the interface between the body and the domed top of the spray can. The front of the adapter includes a compartment that houses a polychromatic light source for lighting the surface and/or a light beam arrangement for targeting and positioning the spray can with respect to the surface.