Does anyone know what's the small white square gadget with two black buttons on the right hand side of the hatch frame in this video on the second 2185 (36:25 minutes)?

enter image description here

I've been looking everywhere but I can't get a clearer image or information about it, and it seems to be next to almost every hatch of the ISS.

  • 7
    $\begingroup$ That's the call button for the space elevator. $\endgroup$
    – Mark
    May 22, 2021 at 0:10

1 Answer 1


I'll try and find a better picture, but it's the light switch.

Labeled GENERAL LIGHTING, buttons ON and OFF

enter image description here

Cropped from https://images-assets.nasa.gov/image/s130e007774/s130e007774~orig.jpg

The best picture I could find is cropped from https://www.asc-csa.gc.ca/images/recherche/hi-res/7ca21bfc-2a90-4dd9-9e22-a3b13d323a18.jpg

enter image description here

I could find no documentation about it on NASA websites :( I did find this info in the International Space Station Expedition Crew Training Notebook (personal copy)

enter image description here

  • 2
    $\begingroup$ Is there a new, separate control for "General Lighting Color" as well? Is the new RGB solid state LED lighting on the ISS ever used to produce colors other than white? remains unanswered. $\endgroup$
    – uhoh
    May 22, 2021 at 1:03
  • 3
    $\begingroup$ @uhoh ¯_(ツ)_/¯ $\endgroup$ May 22, 2021 at 1:04
  • 1
    $\begingroup$ I love that NASA feels their best and brightest might need to have it explained to them how a light switch works. 😂 $\endgroup$
    – Darren
    May 23, 2021 at 8:51
  • 2
    $\begingroup$ Maybe that button needs to be pressed harder than a home light switch, and the italicised "Firmly" was added after the Best and Brightest had to be told "try again but harder this time" $\endgroup$
    – Robyn
    May 23, 2021 at 11:01
  • $\begingroup$ Is that a common light switch layout in the US? Or is it something NASA had made for the ISS specifically? $\endgroup$
    – Sixtyfive
    May 23, 2021 at 11:12

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.