Would it be possible to increase the size of the searchlight beam? This could be an optional settings.
I'm playing with a darker nights setting and it's really fun to rely on searchlights tower to see at night and to keep the factory border safe. However the light beam is a little to small, I feel increasing the radius by 25-50% (maybe with a gradient towards the outer area) would be perfect.

Sure, I would probably just have to make it a startup option.
(The way that the searchlight beam is defined in the code requires that it be defined before the game "creates" entities)

Also, at bigger sizes, the sprite I use for the spotlight effect might look blurry.
With the HD texture setting enabled though, 25% - 33% probably wouldn't be an issue.

Hard to say when I'll have time to work on it, I'm trying to fix some things that have broken around the house.
This would be an easy change to make while I'm working on the next big update though, so expect it sooner than later.

I have released version 1.2.2 to allow setting the searchlight size as a startup setting to basically whatever you want.

It should start to appear in the mod portal shortly.
If you don't see it in-game you can download it manually here: https://mods.factorio.com/mod/SearchlightAssault/downloads

Thanks for using my mod, have fun!

Looks good, thank you for the quick update!