weed4life where do you keep your ballast for the 150 hps lamp? that shouldn't really share airspace with your plants. with how small your op is, climate conditions should be of minimal concern. also, 47 per cent relative humidity isn't bad, not even for the flowering phase (ideally between 30-50%) veg phase can grow fine up to 70% humidity. I'm fairly new to homegrown and I was glad to see that the hps lamps cook out most of your unwanted humidity. it's good that you're concerned with humidity though, keep an eye on it