Cattleyas - Too much light at night?

[MateoinLosAngeles]

I was watching an old video on the Rick L Orchids Youtube channel and he mentioned that in order to bloom, Cattleyas need complete darkness at night, even a porch light could affect this. When he mentioned that, I remembered a video in which Norman Fang also said something like "if you wake up a Cattleya, like turning the kitchen light at night, they won't bloom for you."

My understanding has always been that Cattleya blooming depends on daytime light as opposed to night light. I'm not sure I would trust the information provided on the aforementioned channels (although I quite enjoy Rick L's voice and his journey through illness and orchids), but I'm curious about whether I can find trustworthy information on this.

As many on this forum know, I live in the middle of a busy city and complete darkness is not achievable unless I lower my blinds, which I never do. However, it's hard for me to believe that some building's lights (or even kitchen lights) placed many feet away from the plants could activate any receptors.

Thoughts?