Creator: https://civitai.com/user/Mraclet
This lora is POTENT if used correctly.
-Add any lighting descriptor (highly recommend "blue hour" or "late night") but things like "dark" or "dimly lit" work fine as well
Literally any keywords that are dark related will make it DARK. try -0.5 to -1 with a "dark" word in your prompt. -You may get blue eyes on dark scenes, simply specify eye color