nope, you do not need cool temps for flowers

[estación seca]

It occurred to me that there are Phals and there are Phals. The summer flowering species like bellina and violacea, and their hybrids, aren't the ones manipulated to flower with temperature drops. It's the winter and spring flowering species like amabilis, aphdrodite and schilleriana, and hybrids, that are manipulated to flower with temperature drops.

[Mr.Fakename]

Temperatures alone are just a piece of the puzzle.

Light intensity and exposure time, fertiliser, water abundance or stress, humidity and so on, are all parts of the same variable.

WW summed it up by saying your theory is flawed.
You mix species and hybrids, day/night variations with seasonal variations, want people to provide detailed scientific explanations to back up everything they say but don't show proof of what you pretend.

Just one example of the things you broadly state :
"First off, in most of southeast Asia where these orchids grow, no such cold spells of 55-65F occur. In Borneo, night time temperatures are often over 75F, and in Malaysia the average temperature is usually above 75F as well - these are tropical, hot rainforest climates."

Phalaenopsis are distributed from China (eg. Phalaenopsis wilsonii) up to Northern Australia (eg. Phalaenopsis amabilis).
Just a portion of Phal species are found in Borneo/Malaysia.

And even for those located in Borneo and Malaysia, you missed a somehow important thing about geography: mountains.
Phal amboinensis and Phal venosa both come from Sulawesi.
Except that amboinensis is found at sea level where it gets the "night time temperatures are often over 75F"; and venosa is found up to 1000m altitude, where it gets the "cold spells of 55-65F".


Whatever your opinion is, you don't have to be cocky about it and systematically diss other posters.

[Ray]

There are “genetics”, “triggers” and “available resources” to consider, and they may work together or apart, and as Clawhammer stated, are not mutually exclusive.