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Hey I'm loving researching building my own grow light lately and would like to add UVA/UVB in the light and wanted to know everyone's experiences with them. Does UVB work better than UVA? Main reason is I can't find a UVB led but I can find a UVA led.

I know in 2014 cree broke the record with 303 lumens per watt, im not sure if it's been broken again, but im wondering if someone knows where these chips can be accessed? Most cob builds ive seen get around 125 lumens per watt, and I would like to see what better chips could do

Hey everybody, I've been wanting to order some powders/salts to make my own nutrients, and I'm wondering if there is a way to add a ph buffer like GH does. I like the ease it gives me when I add it to RO water (ph issues are so rare, or non-existant). Is there a 5.8ph buffer somewhere I can buy...

I posted a few weeks ago about how my MH/HPS set up was WAY too hot. I am not able to do any venting, so I'm pushed to use LEDs. My question is do you think this light would produce too much heat in a 3x3x8 closet? There is also a 450w and 300w version. I just want to be able to grow to save...

I have been trying to grow medically in closet. It's 3x3x8, I have a 600w MH bulb in now and it's way too hot. I have a fan, but it's too hot to make a difference. I'd there a small AC I could put in the grow room that would bring the temp down 15-20 degrees?

Hello everyone, I've asked a few other places and didn't get any answers. I'm looking ato building my own led grow light for a grow space that is 3ft/3ft/8ft with little ventilation options. I was thinking about using 3 cree cxa3070 cool white 5000k for veg and 3 cree cxa3070 warm white...