To create a light rail molding, cabinetmakers can use a separately carved piece of wood or simply utilize scrap pieces from the cabinet’s original construction. Most light rail moldings are added to a project on sight at the conclusion of the installation, but they can also be added at anytime if an owner decides to install underside lighting at a later date. The most difficult part of the installation is in ensuring that a proper cutout is created in the wood to allow it to be attached to the lower front edge of an installed top cabinet.