Glowstick radius

[Damascus Rose]

I really enjoy that green shimmer. I missed it in Black Plague.
The light was a good atmospheric bonus. In Black Plague the glowstick doesn't improve the atmosphere - it'd by far too low. But it's realistic because of the lifetime of a glowstick.
But I find that Overture looks the best. And it's the best Penumbra game because of the experience (more involving puzzles etc.) but Black Plague was a bit more horror.
I think you have so search the shader folder to change lighting effects.
This is the way I reduced the item lights in Amnesia.

Nah, black plague was better, Overture had horribly unrealistic puzzles, and those annoying hubs with the wandering dogs. Also, the story wasn't as deep of course. The combat also didn't work too well. Overture honestly wasn't too scary, except for those spideys.