Lighting, Humidity and Temperature
 

So I bought a new cool vapor humidifier and I put up the shelf last month for the orchids. I have a bloom plus grow light also and I keep the humidity around 50% and adjusted the lighting to around 20 - 22 inches above the plants. Though for the*temperature at night, I might have to either buy a small AC or fan because my mom isn't a fan of cold temperatures or I'll bring the plants downstairs at night by the washroom that's normally cold since it's close to the outside exit. Im still kind of fresh to growing cattleyas and haven't bloomed one myself. Mostly worried about the temperature change. I think the lighting and humidity have been taken care of.

I think you may be overly concerned about diurnal temperature swings. The difference in leaf warming from the lights being on, then off might be sufficient.

Okay. That's good to know. I'll be sure to keep watch on that.