Hollywood style spotlight in HO scale?

I have a movie theater scene on our HO layout. To the left of this photo you can see a spotlight trailer:

It might be neat to light this spotlight, so I was thinking of ways to get a very bright light for this. Does anyone here have any ideas on what might work to simulate a spotlight? Obviously not moving, but maybe a high beam of light might be possible.

Maybe a bright 10mm LED or something with a small focus area of light?

I’m not sure what to even look for online, so that’s why I posted the question hoping someone here might be able to guide me where to look.

In case you’re wondering, the spotlight trailer came with a DPM building kit.

A dollar store LED light and a small trailer:

Trident has a WWII “infra-red searchlight” http://www.walthers.com/exec/productinfo/729-96018

Mantua or Tyco used to have “searchlight cars”, a caboose with a spotlight mounted on one end platform. Check e-bay