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.
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.