temp and humidity question please

anyone have any idea if temp and humidity fluctuation have a big effect on the plants ? the humidity drops and rises within 49%-66%. The temp 73-88F
think i need to do something about that and how? heh hope this isn;t to tricky thanks.

im in a box 4' tall 2' wide and 2' deep thanks again

sounds like you need better ventilation.

temp and humidity have a lot to do with growing you should try to have a 10 deggery change from day to night it should be 10 deg higher in the day so the perffit temp is in your flower room in the day it should be around 70 to 80 and try to not let the temp get no higher then 80 inless your running co2 . And in the night time have it at around 70 to 60 and try to not let the temp get no lower then 60 . And as for humidity should be in your flower room at 50% to 30% and in veg it should be around 20 to 40% and thats just what i have been doing and every thing always turns out pertty good for me so good luck my fellow green thump hope this helps you out