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If you have neighbors above you, you have a insulated ceiling, if this is a "holding in the heat" question. You really only need to insulate for heat if the other side of the wall, floor, or ceiling is outside. If you are trying to block sound then insulating the ceiling might help. There are...

You really only need one inline fan and can suck air through your carbon filter and exhaust it "somewhere". The negative pressure will bring in fresh air. I am not an expert with killing smells but I do have a six inch carbon filter hooked to an inline fan that previously was used in my flower...

My late younger brother suggested to me that he was going to grow in his attic and had saved all these styrofoam coolers to make himself an insulated igloo of a grow space. I asked him if he was going to keep all that deep south heat (Northeast Arkansas) inside his grow space. He hadn't...

I got some seeds from Prairie State Genetics, from IL that I haven't grown yet. Headband Incident, parents G13 Neville, Pineapple C99, and Sour Diesel. $5 shipping. I want some feminized Central/South American Sativa seeds anybody know where these are available stateside?

I had Durban doing this too early and yes it had pollenated. Stess early in flower

Root Riot then to net pots with hydroton into the tray

I vote using the flood trays and stand under them to drain into. This is what I do 3x3 tray in a 4x4x8 space. My plumbing is dead center of the tray straight down into the tote. Fan placed open front facing, 2nd fan blowing down from ceiling height.

Will do a scrog so whole area should get covered I will play with the light, just concerned about burning the top Turn it up little by little

I've made a couple of post on rollitup about lack of communication from HLG. 1st Brock at HLG returned my call today. He had called before but didn't leave a message and I didn't recognize the number. He patiently answered my questions. Thank you Brock.

First- eating crow, HLG called before and didn't leave a message and I didn't recognize the number. 2nd- replacement boards for the 600R are the 288s listed on their product page. 3rd- If you want to adjust light height and don't have a PAR meter, Set light height at 30" and full power, take a...

Brock from HLG called, he had called some time ago and no message was left. So they did and will return calls.

I shouldn't need to contact HLG unless I need to replace anything. One of the reasons I bought them, it looked as if the light boards on the bottom were replaceable if needed

This is what I wanted to know. It didn't have to be exact to the watt. You are telling me it's linear, for all I knew it was logrithmic. When I turn the dimmer down, it seems to not change much to my eyes, until I turn it pretty far down.

I got a couple of these lights and haven't started a grow with them yet. I can't seem to get HLG to communicate with me. They don't answer their email or phone messages. My question is about the dimmer and output power. What is the increment change or value of each click of the dimmer? I...

I bought two 600Rs and have sent both an email and called asking a question and haven't heard a thing. It's been a couple of weeks. I have mentioned this in a survey and will voice my dissatisfaction with HLGs communication at every opportunity.

I had planned to dim them down. I read they are more efficient at less than full power. Thus the questions about measuring lumens and adjusting the dimmer to hit desired percentage of power output. I have AC in both rooms. I have exhaust in both rooms and have used them and AC together and...