Driving through the Hernando-Pasco county area, I noticed on the bottom of some of the traffic lights small, white bulbs. So, I gotta ask–'sup wit dem? Are they used at night to let drivers of tall vehicles know the clearance of the lights? Are they mind-control devices that the Bush government’s installing to render the inhabitants of semi-rural Florida obedient and loyal?
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What are they-they-they-they?
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Do they actually emit light?
Otherwise, you may be seeing special infra red detectors that are used by firefighters to trip the light in their favor as they approach it.
I’m sure you all are aware that an amber light means “prepare to stop , the light is changing to red” not "speed up and beat the light before it turns red even though you’re a mile from the light’? Well that little light at the bottom allows a polceman sitting off to a side to know when the signal has changed, so that you can’t claim that the light was still amber when you ran it as he is writing you a ticket for running a red light.
Could they be cheat lights? We have something like this where I live, and they are there so a police officer can sit in a safe position at an intersection that is traditionally the sight of major red-runners, and tell whether the opposing light is red from an angle where he can’t actually SEE the red light itself. Ours are blue, though.
It was in the daytime, and around noon, so I couldn’t tell if they were emitting light, Zenster.
Here we have small flashing lights at the bottom of the traffic signals that go off when emergencies occur. This lets the motorists know that the signals are not stuck, emergency vehicles will be traveling through.
As has been mentioned, many cities use the Opticom system, which changes the light to green for oncoming emergency vehicles.
Some places have a notifier that lights up when an emergency vehicle is approaching, a signal the light is going to change soon. You could also be looking at the Opticom receiver.
Check out the stuff in this link. It has some good pictures of equipment involved and a good explanation of how it works.
St. Urho
EMT/Firefighter
We have the OptiCam system, or something similar, in my town. It’s activated by a strobe light mounted on the lightbars of emergency vehicles.
A few years ago, when our local bus system was still using a curbside as the “bus station” (proper station hadn’t been built yet) a cop had a car driver pulled over across the street. He forgot to turn off his strobe, so the traffic light ahead of him remained green for about fifteen minutes. The result, of course, was that traffic on the cross street got really backed up while all these drivers sat at an eternal red light. Once I figured out what was going on, I mentioned it to one of the bus drivers, who trotted across the street and politely asked the cop to please turn off his strobe 
Welcome aboard(s), Phase42!
Thanks, everyone. Those lights really were kinda bugging me. Now, about those chemtrails…