250w/d.i.y./box

Hi @AFCA161 welcome to OG!
Nicely built box…!

Yea definitelly check the humidity and preferably use hygrometer.

In my experience adding humidifier helps especially with young plants and seedlings (rasing to ~60% RH). The need to add humidity in later stages decreases.

Just for the reference… Link to FAQ about humidity: What range should I maintain for my growroom humidity and temperature?

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