400W White Widow and Lemon Kush Grow

Hello, this is my first grow of 4x Nirvana White Widow and 2X Female Seeds Co Lemon Kush.
Soil mix 30% Perlite and 70% soil (PH is around 7.0-7.2)
Humidity is 40-60%, but temps are the problem I struggle with, sometimes it goes over 90 degree.
Grow room dimensions are 2.5ftx4ftx5ft.
 
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