Here the sources disagree, and you should know it before fixing a room temperature.
The DMR Hindi folder holds spawned bags in a dark room at 25 to 35 C with 80 to 90 percent humidity. TNAU Coimbatore specifies 22 to 25 C and 85 to 90 percent for the same stage. DMR's own species table gives 25 to 30 C.

