Some people understand when you tell them, not to piss on an electric fence,
others have to find out for themselves. ~ Im'one
A good approach to just about anything in life is to hope for the best,
but be prepared for the worst.
Civilization is the history of conspiracy!
What is civilization but, a conspiracy,
for all of us to do better, working together! ~Snowden
“The ultimate measure of a man is not where he stands in moments of comfort and convenience,
but where he stands at times of challenge and controversy.”
May the fleas of a thousand camels infest
the crotch of the person who screws up your day and,
Why spread false info? Stem elongation is generally reduced when day/light time temps are closer to equal or less than night. Temperature manipulation can be quite beneficial.
The OP asked about negative effects, not benefits. The potential negative effect is that optimal plant growth occurs when there is a +ve DIF, therefore creating either a -ve or a zero DIF will mean growth is sub-optimal. Not catastrophic, not markedly so, just not optimal.
Until this year, my garden ran at night. Dark during the day. Couldn't work at night as well, anymore, so we switched. Other than having more time to manage the plants, I don't notice a difference in the grow. YMMV
The material contained in Simon's posts is driven by an overactive imagination. Any pictures that Simon may post were found on the Internet and falsely presented as his. Simon does not grow Cannabis, nor has he ever cultivated any illegal substance. Any representations leading to an opposite conclusion are based on pure fantasy.
Where I live it gets hot and one can't grow indoors unless its Fall or Winter. Even in the Fall, the indoor garden has to be grown at night. Many times the day and night temps were out of sequence. Also the daily wet to dry atmosphere (dewpoint) and relative humidity were out of sequence. There's nothing I could do about it, without costing more than what it was worth in the long run. I can truly say the negative results from the night gardens in the past were more resin and more potent buds than commonly grown plants. They're more work but worth the trouble.
I've always run my rooms with very little delta between day and night for temp and humidity. Never had any issues, but I can't speak to whether or not there's a detriment as I've not done any side by sides. I can't really change anything as my arduinos aren't currently programmed with a clock so it's all the same. Some day I might just reprogram them for more functionality and see what comes of it.