During a stroll yesterday evening, I took some snaps and noticed that I didn't seem able to make my Sony SLT-A35 record as-green-a-green-light as I saw, cast from the traffic lights onto the surroundings -- red and yellow, yes; green, not really.
I worked through the white balance options but without really bridging the difference between what I saw and what the camera recorded.
(These were old traffic lights, with a red / yellow / green filter glass over a similar light source.)