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They're an additional feature to focus your attention towards the traffic light. The human eye is quicker to catch a flashing light than a steady light.

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12y ago

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What lights light up on the rear brake light on a 2000 Dodge ram what are the white on the light for?

The white parts of the tail lights are the reverse lights.


Is a ghost near you if you see a white light?

No. White lights are not an indication of ghosts.


How do you light pumpkins with tiny white lights?

You put a tea light inside it.


Why are lights on radio towers sometimes white sometimes red sometimes blinking sometimes not and change from day to day?

Not 100% Certain, but based on my observations, I'd say it's either due to the type of structure it is, and how tall the structure is. There are those huge red and white towers that are used for airline communication during mid-flight. These always have Red lights the fade on and off. Antenna's (On towers or tall buildings) have white strobes Taller Bridges usually have constant red lights on the highest points. Again, these are only OBSERVATIONS!! : )


When boating at night what does a white light mean on a vessel?

A white light used by itself which can be seen in all directions is the anchor light, which means you are anchored. A white used in conjunction with bow lights (green and red) are your navigation lights. The white light indicates your stern ( back of boat). If all you can see is the white light, a boat is either anchored or underway going away from you.


You are operating a powerboat at night. You see red green and white lights on another boat what do these lights tell you?

That a power driven ship is headed right for you. The green and red lights are the navigational side lanterns and the white light is the top light.


You are operating a powerboat at night. You see red green and white lights on another boat. What do these lights tell you?

That a power driven ship is headed right for you. The green and red lights are the navigational side lanterns and the white light is the top light.


You are operating a powerboat at night You see red green and white lights on another boat What do these lights tell you?

That a power driven ship is headed right for you. The green and red lights are the navigational side lanterns and the white light is the top light.


What is blinking red and blue in the sky and it is not a plane?

Aircraft have red and GREEN wingtip lights, not red and blue. (And you cannot see both the red and green lights together, unless it is heading straight toward you.) Aircraft also have white strobe lights on the belly. Is it moving against the background of the stars? High in the sky, or down low near the horizon? How fast was it blinking?


Why are there blinking red lights on radio towers?

So airplanes and other aircraft won't crash into them. So airplanes don't hit them. FYI, Airport Towers have a rotating beacon that has a white light that shines out several miles and on the back of this is a green light. This helps aircraft locate civilian airports in bad weather.


You are operating a powerboat at night you see a red green and white light on another boat what do these lights tell you?

That a power driven ship is headed right for you. The green and red lights are the navigational side lanterns and the white light is the top light.


How do disco lights work?

They have color filters. A red filter, for example, transmits only red light that is emitted from the white light bulb. (White light is a combination of all colors of light) A green disco light has a green screen/filter that only lets through the green light photons form the white light. So, your eyes only see the green or the red wavelengths.