2 - 600w HPS - air cooled reflectors
Grow area - 2'6" x 7' x 8'
Vortex Fan - 449 cfm
Intake - Passive from A/C room
Plants - 8 Mandala Hashberry

Question - My temperature goes up to and stabilizes at 94.4 degrees - the relative humidity is 37% during the day and 78 degrees at night. Will my plants grow satisfactorily in that environment? Without running a direct A/C duct line to the room - that's the lowest I can get the temp with the lights on.

A humidity and temperature gauge are essential in any growroom. Daytime conditions should be 70-80 degrees without co2, 80-90 degrees with co2 until the last two weeks when daytime temps should be kept between 70-80 and co2 can be reduced to adjust for the lower metabolism. Night temperatures should be kept above 60 degrees to prevent stress. It is preferrable during flowering to have a night temperature drop of 10-20 degrees to stimulate flowering hormones and reduce stem elongation.

I find that low humidity causes stress on plants. I recommend 50-60% humidity until the final 2 weeks of flowering. At this point, the humidity should be lowered as much as possible to encourage the plant to seal and protect itself with additional resin. (I am able to get the humidity to go as low as 31%) I have been able to frost things up considerably this way. The higher humidity levels prior to final ripening reduce salt levels within the plant tissue and encourage healthy, more lush growth.