Cannabis Grow Rooms

Hi, Can the group give me their opinions on the benefits or otherwise of placing one's flowering plants from lights to directly into the sun for a few hours each day. I can put them out for say 4hrs around noon. This would be after a few hours under HPS, ( thanks AL.B.Fuct ) ..Then for the last few hours of the 12/12, they would be back under the light. Would those few hours in the direct summer sun hurt any development or potency due to the different spectrum?

hi all! i'm starting my first indoor grow in a 60x60x120 (0.36m2) grow box. i did all the construction work and it's ready to go but i'm having trouble deciding whether to use a 150 or 250w hps. i will use fluoros for earlier stages of vegetation and then switch to hps later. i want to have 2 (or three if possible) plants in the box, and will probably be using lst method. the 150w has 17000 lumens and the 250w 31000 lumens. i was advised to use the 250, but it seems too much to me. is it, or should i go with the 250? is there such a thing as too much light? thanks, jose

I was just looking at some lights and i was wondering if these were any good http://www.insidesun.com/store.php?cmd=vie...74a057900a361a9 Also i was wondering if it was worth the extra money for the hortilux bulb.

I have woken twice now to find my 600W HPS turned off - or rather - trying to ignite itself, the bulb flickering. The first time I found the cord going into the ballast was loose but this morning it was in tight and the light had died sometime in the last 3 hrs. any ideas? Jimbo

Lets start by me declaring that I have very little understanding of how air-conditioners in a grow room work. OK? I'm moving house and the new room has a air conditioner in it. I think you call it a split system (the thin vent on the wall and the big box outside...) anyway...I presume that I can't run this without CO2 injection? yes/No? - and if I did, would it leak the smell from it's exhaust? Is there any way to filter an AC? Here's a pic of the AC details anyway incase it helps...it's in a 3x4m room. Jimbo

550mm x 400mm x 1200mm - 2.4 squarefeet Obviously a small space, initially I was researching what it would take to implement a 400watt son-t agro. My research leads me to believe this may not be possible. Also, there seems to be a lack of lower wattage hps lights avaliable in Australia. I would really appreciate some advice regarding lighting/ventilation combo for this space. 1 or 2 plants - first grow. Thanks in advance.

I should have known better but here's what happened. My daughters Mr wanted to learn so he built another box and I put the clones in and gave the girls 36 dark to start flowering about a week ago. The Boy was supposed to have set the timer for 7am -7pm lights on. He STILL hasn't gotten it straight! The lights went off at 6:30 pm and then came on again at 2am, and when they tried to go off at 2pm I had him go and put the lights back on, and get a new digital timer. My dilemma is, I'm second guessing myself. I plan to leave the lights on until 7pm, and then get them back on track... but I wonder if they need a longer dark period maybe 24hrs... what would you all do??? I'…

If me fan is 101L/sec how much CFM is that......also isa mixed flow inline fan same as centrafugal fan or totally different?

hey boys and gals, in a space of 1.2x1.2x2 tent im looking at a 125mm centrifugal pumping out 4.8cubic/minute.....is this sufficent??? Some italian cavo brand. id get a bigger fan but the silly tent seems 2 have a 125mm exaust vent stitched in, been told this would be enough ( 400 watt hps light ) and would this work with a 600watta??? thankyou all.