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Need advice / opinions - 2 400 watt hps vs 600w hps in 4x4 tent

Discussion in 'Indoor Growing' started by growin-Jables, Oct 18, 2017.

  1.  
    growin-Jables

    growin-Jables Well-Known Member

    It's really one of the biggest controversy out right now. CMH vs HPS . Half says having the heavy red spectrum is better for flower but then the other half argued the more efficient and usable light aspect despite much less red spectrum. It'll come down to one day when I decide to go that route. Although i have to say with all due respect of course , im by no means a pro at this stuff. But i think running a 400w hps with a 315cmh would be tits. Mixing lighting how benefited my grows here in the past and just imagine having half heavy red spectrum and half more usable light from the full spectrum would be ideal nay?
     
    since1991 and Cletus clem like this.
  2.  
    since1991

    since1991 Well-Known Member

    Good selection advice. But cmh is HID first off. And single ended hps isnt going anywhere. You can bank on that. Cmh is a great fixture. But it is no hps replacement. I know very close friends that run them. They put off a great spectrum. Hps is still king. Especially double ended.
     
  3.  
    Cletus clem

    Cletus clem Well-Known Member

    I can dig that. Indoor gardening is a very new thing, more and more technology and information is becoming available but people have a tendency to fear change. A year snd a half ago, there is no way you wouldve been able to convince me that i could grow what i do now with 3 little half dollar sized led chips and 240 watts. Im on my second run and really amazed at what im getting in all aspects. My cmh room is down atm, never really got the chance to dial it in but should be good to go shortly and back with a vengance! Moving into a better space in all aspects but theres work to be done. Check out my ig @tetsuogentec. Ive got all sorts of stuff up in this forum but alot of it i also post there and its easier to check out.
     
  4.  
    Cletus clem

    Cletus clem Well-Known Member

    Well aware. Maybe you missed the “old school”. Hid lighting is already starting to be banned in places in favor of more efficient lighting. Those same places allow cmh. The thing is though, dont really care to argue. If i can share my knowledge with someone and help them out, i gladly do. You have it all figured out. Awesome.
     
    SchmoeJoe, upnsmoke13 and since1991 like this.
  5.  
    since1991

    since1991 Well-Known Member

    It would be interesting to see how the 600 and 1000 watt double ended cmh fixtures pan out. For sure.
     
  6.  
    MarWan

    MarWan Well-Known Member

    done that in a 4 x 4 but with a 330w cmh. Plants under HPS had slightly bigger buds and took a little longer to finish, cmh side had better frost and looks, and finished 7-10 days earlier.

    right now I run 2 x 200w cree cxb3590 3500k bars and a single 315w 4100k cmh in a 4 x 4. I would say that 200w of cob is almost as good as 315w cmh.
     
    since1991 likes this.
  7.  
    CanadianDank

    CanadianDank Well-Known Member

    How about quality or diff in appearance between cob and cmh?
     
  8.  
    MarWan

    MarWan Well-Known Member

    I've only ran 200w of cobs once before along with cmh, and I cannot give you an honest opinion, except for it performed as good as the cmh, and couldn't tell if there was any difference in the quality of buds.
     
  9.  
    growin-Jables

    growin-Jables Well-Known Member

    Here's a picture of my current light set up. Decided on goimg with 2 400 watt hid. One hps. One MH. Currently im running

    400w Hps. ( currently have my MH bulb simce I will be harvesting the OG Ghost train haze soon) 20171022_005215.jpg 20171022_005409.jpg 20171022_005457.jpg
    450w ( 200w actual) viparspectra led
    3 - 23w 2700kcfl
    2 - 23w 6500l cfls for corner lighting
     
  10.  
    growin-Jables

    growin-Jables Well-Known Member

    That makes alot of sense . I geuss it probably comes down to the wattage factor as well . The whole Grams per watt scale. I have yet to fully pack my tent full and flower all at once because i wanted to get the basics down and harvest one at a time so i can take as much time as I need with each one and not feel rushed and just make sure im doing everything right . The plant I yielded 4.3ozs off of, I probably could of fit 4 similar size plants in my 4x4 so I have some Cinderella99 and LA Affie fem seeds im going to try a scrog with
     
  11.  
    -DreamK

    -DreamK Member

    Hi Jables,

    I have used 600w with 1x1m tent (round 3,4ft x 3,4ft) for years and it seems that 1 600w HPS can provide enought light for that area easily. The buds that grow in the middle are just as big and thick as the buds growing at the side of the tent. Because of that I don't think you get much benefit from 2 400w HPS's. Also, the light penetration is better with 600w so you get good quality buds under the canopy too.

    You can check my post where I listed my setup and yields etc:http://www.rollitup.org/t/is-it-possible-to-bigger-yields.951858/

    I get around 650-690g/1m2/12weeks =
    23 - 24,5 ounce / 3,4 feet / 12 weeks

    If you wish to have even bigger yields then you might need to put more light in but I guess 1 600w is enought for 4 x 4 tent.
     
    Yodaweed likes this.
  12.  
    growin-Jables

    growin-Jables Well-Known Member

    would I not have better canopy penetration with 2 hid lights to spread out over the top of the canopys vs just one single bulb ? I don't think a 600 would give me better penetration throughout the entire 4x4 tent vs to 400's. 600w can strongly cover 3x3 and would do pretty good in the 4x4. But a 400 can strongly cover a 2x2 area. so having two of those would fully cover 4x4 telling me that it would probably give better light spread and have better coverage
     
  13.  
    -DreamK

    -DreamK Member

    IThe "sweet spot" for your buds with 400w hps is 12"-19" and with 600w hps its 14"-25". That's why I think the penetration (Im not sure is this 100% correct term) is better with 600w. You can find this info from google easily.

    Because of your "small" grow area I think you dont get that much benefit from 2 x 400w. I dont think it hurts either but it might be waste of time/money.
     
    cindysid likes this.
  14.  
    upnsmoke13

    upnsmoke13 Well-Known Member

    I have enough to setup two 600 or 400 to cover my area but never ran them. I'm nursing two babies, with plans of a two screen scrog in a 4x4. Been watching the thread to get insight.
    I was wondering about the area between the reflectors getting overlap, would this not create a hot spot - giving you go with a double light setup?
     
  15.  
    growin-Jables

    growin-Jables Well-Known Member

    I see what your saying. I think those sweet spot measurements are more based off of heat restrictions vs light intensity. I mean I can drop my 400w down to 10 inches on cold days and not even come close to burning the buds. In Fact they get bigger the closer I can get that light without burning the buds. Plus the closer they get the better it penetrates and more lumens are available due to less distance between bulb and canopy. Also , I was just thinking about how if I go with a 600w. It will be difficult to utilize my led that sits 12 inches above the canopy. So it difficult to place without blocking light from the hid. With 400w it also sits at 12inches. So pretty even with led. Nothing gets shaded . If I did 2 400s with my 200w led, I would have a fixture over nearly 3/4 of the entire surface area
     
  16.  
    Budget Buds

    Budget Buds Well-Known Member

    Pitch the lesser wattage lights, Invest in a 1000 hps and flip one of the 4 inch fans till it's also exhausting with vent holes to equally exchange the air, Problem solved, Giant buds and cheaper then most idea's ....
     
    since1991 likes this.
  17.  
    since1991

    since1991 Well-Known Member

    My cousin had 4x 600 watt hps lamps in a 7x7x7 tent. And CRANKED out some production. Actually it was my old setup I sold her when I bough 8 Gavita 6/750's. Lemme tell ya...there is a limit to light in an area but most wont reach it. I say the more the better if all other parameters are met. My cousin and I consistently pulled 4.5 to 5.5 pounds of trimmed dried nuggetry (good nugs too. No bullshit) every 60 days out that tent. I say Jam 2 sixers (or 1x 1000) in that little ass 4x4 tent and rock some shit out is my opinion.
     
  18.  
    since1991

    since1991 Well-Known Member

    THIS^^^^ This cat knows whats up
     
  19.  
    growin-Jables

    growin-Jables Well-Known Member

    I'd lose out potency having only hps spectrum. Vs mixing . It's personal use smoke so potency before yield . But im still wanting bigger buds with equal potency to what im getting now. During the summer theres no way possibly I could use that 1000 watter. For anything. My idea is eith 2 400s. I can ditch one during summer months and use that 400w for my veg closet where I currently have 4 ft 8 tube t5
     
    CanadianDank likes this.
  20.  
    since1991

    since1991 Well-Known Member

    Do you really think potency would take a huge hit like you think??? If that was the case then every swinging dick hps grower would be fukt. Cmon. You do watch you gonna do bro. Iam just trying to help you out with what Ive been through. Later tater.
     
    branbran420 likes this.

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