Novice/autos/made mistakes already/ please help

I must say when I bought the light it was on a new year discount so ended up getting it for like 220 and it came rapidly. So far so good. This is my first though so nothing to compare it to I guess
 
Yeah my exhaust fan comes tomorrow when that’s set up I imagine that will drop the humidity even further so I guess next purchase is a humidifier
 
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