Red on runways

What is the red thing on runways like what does it mean the red on the tip of the runways.

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I think the red thing on runways means that the runway is closed and that you have you have to take off or land from the other end of the runway strip.


huh? please elaborate.

If you mean the 2 light that turn white or read, that shows if you’re above or under the glideslope.
Red is underneath and white over. One red and one white perfect

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That means they are closed.

The red numbers indicate that the winds are less favorable for that runway. They do not mean that it’s closed. Some airports use a 1 way in - 1 way out (approach - departure) such as KASE, even if it means landing with a tailwind.