As I was searching lighting, I came across lighting ratios. This never seemed to have occurred to me but was something I found interesting and was something I could investigate. I found this table that was able to help me understand a bit more on how it all worked etc.
1:1 – No difference (flat lighting)
2:1 – One f-stop (for general colour photography, videography)
4:1 – Two f-stops (for low-key dramatic effect)
8:1 – Three f-stop (film noir)