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Incandescent Lights are the oldest kind of lights that are used for crossing signals. These have been on crossings every since the invention of the wigwag. These first came in 8" form in the late 1920's on Griswold Rotating Banners. 12" lights were invented in the early 1970's. Norfolk Southern is the only Class 1 railroad that still exclusively uses incandescent lights on newer installations. Basically, all incandescent lights use the same exact parts, but there are some slight differences. Such as lenses, and wattage. The trick to getting the whole light to light up from a little 25 watt bulb is due to reflectors at the very back of the light. |
8" incandescent light lit up at New Buffalo, MI. on 9/3/2004. |
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12" MI incandescent lights barely lit up due to bad reflectors at Riverside, CA. on 7/23/2003. |
12" Safetran incandescent lights lit up in Charlotte, MI taken sometime in late 2004. |
12" Harmon incandescent lights barely lit up at Flagstaff, AZ on 2/4/2001. |
12" Harmon incandescent lights lit up at Burlingame, CA on 7/28/2008. |
 12" GRS LEX-C plastic incandescent lights seen lit at Franklin Park, IL on 11/5/2005. |
 8" GRS LEX-C plastic incandescent lights seen un-lit at Midland, MI on 10/22/2004. |
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 12" Safetran incandescent lights seen lit at O'Fallon, IL on 8/29/2004. |
