Maximum temperature to grow indoors

Howdy people, I'm setting up a indoor grow box for my Trinidad Scorpian that didn't end up fruiting. I was wondering if anyone had advice on a maximum temperature I can run, the light runs warm and if I can get away without cooling the box it would be good. It is sitting at 48°C right now (118 in the 'merican speak)
 
:welcome: from the Pacific NorthWest, USA!
 
Welcome. My thoughts would be anything higher than 30-35*C would be hard on the plants as well as cause evaporation/humidity issues.
My grow room in Canada would start to see leaves getting all bumpy and struggle from how quickly the evaporation was happening around 30*C.
 
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