humidity 80 pluse help fist cop

hi new on this new 2 growing 2 got2.4 x1.2 m tent in my shed im in flowe humidity 80 pluse just bougth dehumidifier on ebay 2 night

is that with lights on because humidity rises when it's cooler at lights off. That's a very unhealthy level even for vegging.
the only temporary fix is venting the damp air out.

Clones 80-95% Veg 60-70% Flower 40-60%

Might think about 2 dehumids. Make sure you have good airflow around the plants and out of the shed but make sure you have a carbon filter on the one going out of the shed. Your humidity that high almost guarantees you bud mold. Humidity goes up 15-30% at night when the lights are out so leave some fans on if not all of them.