What is too hot for your grow room?

There is a lot more to this but what do you think boosts THC at the end of harvest? The dark period, the flush, stem splitting, not a damn thing its all myth? I think max terp production is what we really want to increase at the end but...

i’ve been thinking how to set into overdrive mode. The goal is quantity. probably gonna get a 4x4 with a 600w dimmable hps. Just gonna manage heat output, but is 600w full blast too much for a 4x4?  what am I looking forward to?