Way back at the time of the 1970 BN merger, merger partner Burlington Route had headlights mounted in the noses of most of it's low nose units, after a few years it was found that trainmen were getting severe burns from bumping into the nose mounted headlights and a program was started to move headlights up between the number boards. (And the BN ordered F-45's were ordered with headlights mounted between the number boards rather than in the nose door as they were in the GN ordered F-45's.) This was fine until the BN merged with the Santa Fe and a program was started to move headlights from between the number boards back to the noses in an effort to reduce glare and improve night vision.