Designed straight from the prototype, this 'tire-iron' tree has four (4) ditchlights for use on second-generation units.
Found on everything from BC Rail (nee-Erie Lackawanna, now Delaware-Lackawanna) ALCO Century locos to CP Rail's venerable SD-40s, these parts come with an insert sleeve for insertion into the low hood or pilot (as proto-applicable).
Exact sleeve diameter is 3/32" (generally it's own drill size, or between a #41 and #42 drill bit). If adding lenses, go for 0.085" (2.16 mm) lenses. Comparable commercial part is [somewhat hard-to-find] Detail Associates 1013.
Item is also available in our eBay store at this link
Image and design copyright Excelsior Detail-Orientation, 2018. Original design by Monroe Locomotive Works.