Dehumidifier size 4x4 tent

Depends what you want to do with it. If you want to use it to cause extreme stress near end of flower buy one made for a room or even a portable. Keep your humidity below 50rh or you will regret it. If your humidity Sits around 65 you are going to need some serious dehumidification. Personally wouldn't dehumidify the tent when it has a fresh air intake, just going to be humidifying the outside world burning your electric. Idea is to create a negative pressure within the tent that remains below 50rh this will cause a cycle of drought that will NEVER allow mold or bugs the chance to settle. The space outside the tent should be fed fresh air and have a tiny 15w fan suck in co2 from as close to the floor as you can. Co2 is heavy and lowest point of room is also coldest.

I honestly don't look at the wattage when judging something like this - I only look to see what size space it can control and they will usually tell you. Sorry!