They don't yellow.......they char up......... I stuck my finger through one before with not much effort just trying to remove it from a signal I was working on....
@Nick yes i have seen discolored traffic light lenses...Gadsden Alabama had plenty of 8 and 12" Signals with poly lenses with a Yellow-Brown discoloration smack dab in the middle of the lense.
What kind of lamps do you use? I use 135w signal lamps in my 12" section and it's really bright. I use 60w clear lamps in my 8" sections though since I can't find 69w signal lamps.
One has a 40 watt lamp and the others have 60w lamps. Even the few incandescents i see, especially the green, the color isn't strong. It's like a whitish blue-green color
I guess it depends on the condition of the lens too, the problem I have with LEDs is that the colours aren't consistent especially the greens...some look almost like incandescent but some can look really blue.
Also took one at the traffic signal collector meet last year and smashed through it with my fist. Thing distingrated...........
And Toronto still has a lot of incandescent amber lights. My area is completely LED though.
i don't like plastic lenses period....they always dull and yellow eventually.
They don't yellow.......they char up......... I stuck my finger through one before with not much effort just trying to remove it from a signal I was working on....
@Nick yes i have seen discolored traffic light lenses...Gadsden Alabama had plenty of 8 and 12" Signals with poly lenses with a Yellow-Brown discoloration smack dab in the middle of the lense.