# Eerie green light from inside escalators **URL:** \ **Category:** Factual Questions\ **Created:** [August 21, 2008, 4:48pm UTC](https://boards.straightdope.com/t/eerie-green-light-from-inside-escalators/460817 "2008-08-21T16:48:37Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![ntcrawler](https://avatars.discourse-cdn.com/v4/letter/n/34f0e0/32.png) [@ntcrawler](https://boards.straightdope.com/u/ntcrawler)\ **Post date:** [August 21, 2008, 4:48pm UTC](https://boards.straightdope.com/t/eerie-green-light-from-inside-escalators/460817/1 "2008-08-21T16:48:37Z")
While riding the escalator at Rush University hospital and in several other places, while looking down at the moving steps I saw a bright, yellow-green light shining underneath, a color similar to that you sometimes see in copiers while they’re operating. What is that? does it serve a special purpose? And why that color? I’ve edefinitely seen it on several other escalators so it can’t be something unique. ---
**Author:** ![tanstaafl](https://avatars.discourse-cdn.com/v4/letter/t/ba8739/32.png) [@tanstaafl](https://boards.straightdope.com/u/tanstaafl)\ **Post date:** [August 21, 2008, 5:29pm UTC](https://boards.straightdope.com/t/eerie-green-light-from-inside-escalators/460817/2 "2008-08-21T17:29:06Z")
Escalator trolls… 😉 Seriously, [here is Cecil’s answer to that question](http://www.straightdope.com/classics/a3_291.html) ---
**Author:** ![ntcrawler](https://avatars.discourse-cdn.com/v4/letter/n/34f0e0/32.png) [@ntcrawler](https://boards.straightdope.com/u/ntcrawler)\ **Post date:** [August 22, 2008, 2:09am UTC](https://boards.straightdope.com/t/eerie-green-light-from-inside-escalators/460817/3 "2008-08-22T02:09:08Z")
Wow, and here I thought I was the only one who asked! thanks!!! Interesting that the guy who posed the original question almost 18 years ago (goodness!!) is also from the Chicago area.