Lighting and Ventilation
1,620 topics in this forum
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i'm looking at fans here and noticing that you can get a 250mm inline fan which goes 300l/s and costs $97. or i could go a mixed flow 150mm fan which goes 155l/s and pay $170. it's to be used with a carbon filter attached - why would i not get the larger fan? is it because under the slightest load it's performance greatly decreases or?? i can't see any reason besides that of why i'd get the mixed flow? can anyone help?
Last reply by nitram, -
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- 420 Crew
- 8 replies
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i've got a 400W HPS already, the space is perfect for 2, but one still covers everything. i'm asking do you guys think the light intensity from 2 x 400W would be greater than 1 x 600W? or the benefits from 2 x 400W would be worthwhile paying the extra money for power? 1 x 600W or 2 x 400W? i'm going for yield here fellas
Last reply by Dandy, -
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Do you guys reckon the fan will be enough to pull air through the 125mm odor sock in an enclosure roughly 60x50x120cm? The fan is an Ezi air inline fan.. or should i go the 125mm fan? Noise is an issue too but i guess there wouldnt be too muich noise diff between the two. Also can anyone comment on the effectiveness of the odor socks? Cheers. EDIT: Ill be running 200W~ CFL in this cab..
Last reply by psychoresin, -
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http://maximumyield.com/article_sh_db.php?...p;issueVar=June The Digital Sun: Better Light for Better Results by Erik Biksa 2009-06-01 There has been quite a ripple in the world of hydroponics since the introduction of digital lighting systems, sometimes referred to as electronic lighting systems, since their appearance within the last decade or so. As with many emerging new technologies, some of the first generation units showed us lots of promise; and in some instances they delivered on those promises, in others reliability was an issue with a few wrinkles that needed to be ironed out. In the past, unit wattages of 400 watts or less had proved to be more relia…
Last reply by jimbojones5678, -
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Could someone please tell me what is the minimum ambient temperature to keep a 12 watt heated propagator at 21c for cloning?
Last reply by tywyn, -
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-------------------------------------------------------------------------------- hey all, hey i was after some help building my light switch gear box. i have a Telemecanique contactor , circut breaker, (5 min) lock out timer (solid state relay), and a grasslin panel mount timer. i've drawn a diagram can u please help and show me how to wire it up. I live in Australia our power at the powerpoints/mains is 240vac 50hz. I have a bit of a idea but i'd like to make sure i do it right. My contactor is rated for 7.5kw. prehaps any one who knows? and send me the pic back with the right colour wires? Please!!! this will all be mountd in a pvc enclosure. Many thanks really…
Last reply by madazz, -
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- 420 Crew
- 2 replies
- 728 views
What kind of yeild could i expect by using a 400w MH for vegging and flowering?
Last reply by Martvic, -
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Hey all, just curious, I was down my local pawnbrokers and they had a 400w MH ballast bulb and reflector goin for $70 all up, now Im just curious, can you get HPS conversion bulbs that work on MH ballasts like you can get MH bulbs that work on HPS ballast, and also, how terrible is MH for flowering? Cheers
Last reply by Martvic, -
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I need a some help to rewire this http://img.photobucket.com/albums/v411/coach1/LightMedium-1.jpg All the diagrams I have come across have 3 wires coming from the Transformer , this one has only 2 , Red and Blue . It is a 600w HPS Cheers CG
Last reply by Closet Grower, -
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WELL MY BUDS ARE IN AND NOT A BAD BUNCH Well and truly chuffed , Durban poison rocked , some Big Bud and a few Northern Lights , Top 44 was Topsall in all a good run .. Check out my pics Cheers Muckster
Last reply by muckster, -
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- 420 Crew
- 4 replies
- 734 views
hey guys just wondering if you could confirm weather or not it is safe to use green lights when your plants are sleeping i have herd of it from a few people but do not want to try it untill i no it really works dirtyman
Last reply by John Citizen, -
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Well , hi there all you peeps, Big brother is trying to stick it to us another way , Im in NSW , got my latest bill and nearly fell over ANOTHER price rise , we are now paying 19.624 cents per kilowatt How does this compare to other states ??? I only have a small op, and the elec bill is now a real factor, outrageous . what are these guys doing ??? Every year it keeps going up . at what stage do they say ENOUGH.? Cant wait for fuckn summer never been a guerilla grower, but gonna have a real crack this year Take care Muckster
Last reply by Closet Grower, -
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- 420 Crew
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OK, so I'm travelling a road involving CFLs but the 'technician' in me and the primary driving factor being to grow good mull has me looking into the various lighting options. Part of this is looking into the capabilities of lights, the main thing being 'useful lumens' or maybe 'PAR Watts'. The key being a question about 'SO OK what gives the best bang for buck'. Questions about heat also interest me because I'm working in confined space. I feel I have to do this m'self because I can find very little info about practical work in recent times along these lines. I'm probably going to upset some people by suggesting that they have closed their minds 10 years ago and are …
Last reply by Wrangler556, -
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hi I have a room that is 2.1 metres wide and same length a 400 watt metal Halulite light and a 400 watt hps light will be big enuf to grow a plant?
Last reply by Luke Skywalker, -
Curious noobie 1 2
by Goobs-
- 420 Crew
- 11 replies
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Hello all Os'ers I'm looking to start a grow in my cupboard, it is quite small in width, but I believe it will be plenty for the one plant I want to grow, the dimensions are 47cm Width 178cm Height 42 Depth (front to back) i was wondering in a small space like this and only growing one plant, would a 250w HPS suffice? or would the 400w still be the way to go, I have no issue with buying a 400w, it's just if I dont need it I dont want to put up more money than i need to spend. cheers in advance P.S What is better, white paint or panda film, mylar is out of my price range
Last reply by Goobs, -