
Here's what I mean, The light reflects any signal passing through, so if it turns red, it'll be red. As you can tell the signal is yellow, but the light is still green. Even highlighting the power pole still shows a constant green signal output even when the train signal show it being red or yellow.

Dang, just when I thought I could use a flashing signal for a simple clock

EDIT:
This also would effect chain Signals as well.