I (Ritsuo) am a maneger os JUGCC(Japan Uranium Glass Collectors Club).
Thank you for refering our web site on GOLDEN GLOW LIGHT as follows. http://uranglass.gooside.com/goldenlight/goldeneng.htm
Recently, we acquired a big train head light of US steam locomotive made by the
Pyle-National Company for the Lackawanna Railways.
It is similar to the above Japanese train light, and using uranium glass in its mirror.
Its company name Pyle-National Company is embossed on the top of the light, and this company developped the incandescent lamp for trains in 1913.
It is not sure that 1913 lamp applied uranium glass reflector or not, but the age is at least 1913 to 1920.