Lighting and Ventilation
1,620 topics in this forum
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If me fan is 101L/sec how much CFM is that......also isa mixed flow inline fan same as centrafugal fan or totally different?
Last reply by Pure, -
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- 420 Crew
- 13 replies
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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.
Last reply by mrsmokey1, -
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Im looking to buy a 400w HPS Kit setup off ebay. Two different stores offer kits for the same price, one is Growlush and the other is sunmaster. My other question is, this will be my first attempt at a hydroponic grow and i really cannot decide between going for soil, or an ebb and flow setup. I will be growing in a fairly limited area, 1m deep, 1.5m long, 1.8m high. Thanks
Last reply by mrsmokey1, -
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- 420 Crew
- 7 replies
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anyone bought from here? www.aussieponics.com seems really low prices, just gonna place an order myself. they are on ebay aswell. so look pretty good.
Last reply by rippa, -
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- 420 Crew
- 5 replies
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Does anyone know how I can go from lights on @ 8.30pm / off @ 8.30am to lights on @ midnight / off @ midday with minimum stress. At week 8 and about to harvy the top 16 inches or so- scrog and want the bottom half to continue for another 4 weeks and need to change light cycle as having visitors come stay for a few weeks and current cycle is not ideal thanks aussie
Last reply by aussie1, -
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- 420 Crew
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I have 6 54W 4ft long T5 HO Lights. My grow space is a little under 4ft wide so i cant have the lights flush with the top of the closet. should i have the lights vertically (3 on each side of the plants)? or have the lights on an angle above the plants? i attached a diagram it was fun to draw, yeah im a bit stoned....
Last reply by Tom, -
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- 420 Crew
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If you were to combine three 1000W HPS light with one MH 1000W to get a better spectrum of light, where would you position the MH? based on the diagram below? Jimbo And yes... I know the shades aren't facing the correct way...
Last reply by MongyMan, -
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- 12 replies
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I cant seem to get my humidity down and im thinking humidity is the cause of my powdery mold issue. Does a humidifier really do the trick? If im around 70% Rh atm, how much can i expect a humidifier to reduce the RH by? and what size would i need for a 4X4 grow space. Would i put the dehumidifier outside the grow space so the air is already adjusted before it is sucked in through holes in the space, or would i want to find a way to have it inside the crowded growspace? Thanks in advance for the tips!
Last reply by Pam, -
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- 420 Crew
- 11 replies
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been reading the scarce info on this manipulation of light period during week 5 and 6. Has anyone tried this out or have any info or links. The overall procedure will supposedly give plants 80% more light overall and 40% better yielding potential any info appreciated aussie1
Last reply by aussie1, -
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- 420 Crew
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So my humidity is around 70% week 4 of flowering and i have been fighting off some powdery mildew. How can i get the humidity to go down? I bought a good inline fan and though that it would help, but it actually made the humidity go up i think. So should i lower the speed of the intake fan and try to get the temp to rise to 80? (currently 75ish). Add more circulating fans? Any tips?
Last reply by Al B. Fuct, -
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New high powered LEDs 1 2 3
by Gibs- 25 replies
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I really like LEDs and, at least theoretically, they'd make ideal grow lights. Problems so far have been initial cost and (relatively) low lumen output. Enter the new generation of high power, high efficiency LEDs: http://www.luxeonstar.com/item.php?id=5145...=LXML-PD01-0040 There are a few manufacturers making these next gen LEDs (Cree, Lumileds, Seoul semiconductors). From my research - that is, geeking out on candlepowerforums - i figure the best bang for buck to be had is with the new Luxeon Rebels. I've ordered a bunch of the red & blue versions of these. Red & blue because white light is quite inefficient; clorophyll absorbs most strongly in blue & r…
Last reply by Pam, -
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- 707 views
Hello, Question 2. Would all the CFL lights show the colour spectrum details? e.g 2700k If NOT, how would i go about finding them? Thanks
Last reply by Pam, -
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- 420 Crew
- 20 replies
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I'd had my flowering 1000s in service FAR too long. Thought 18 mos, was very embarrassed to notice my texta mark on the tube base was 12/2004... I should be replacing yearly... but ya know... Was a little low on bux, bought a couple of the cheapest 1000 HPS on the shelf in Ye Olde Hydroe Shoppe. These were marked 'made in China' and had straight cylindrical glass envelopes as compared to other big HPS jugs like the GE LucaGrow 1000s which have a pronounced bulge in the middle of the tube. I whipped out my not so accurate (but good enough for comparisons) lux meter (found on special at Bunnies $20 down from $40)... ...and took a reading of the old GE 1000s at …
Last reply by Al B. Fuct, -
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- 420 Crew
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hey i have been thinking about growing my own buds for a while but just havent done so. anyone know where i can get CFL lamps and how much. also i know off topic but when can i start growing outdoors in melb. lots of love and i hope you reply to this because i would be very much appreciated. thank you
Last reply by WantDaChronic, -
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Hi guys, this is probably one for the electricians out there, and I know a lot of people are going to tell me to take this project to one, but I have enough experience with wiring to do this safely, I just need the technical expertise. I obtained an "ATCO OGS400-100" (ballast only), along with a 400w HPS globe. It says it is capable of running MH and HPS, although I will only be using it for HPS. I understand I will also need to get a starter (igniter) and a capacitor (optional?) The part I am unsure of is the whole layout of the thing. The only info I can find involves using transformers with a long side and a short side..... this thing only has 3 connectors... "E" - "B"…
Last reply by Al B. Fuct,