Which set up for flowering

I currently have 6 ice plants topped a few times almost ready to be flowered

I already have 2 400 watt HPS / MH lamps and a t5 flouresent inside a 4 x 4 x 6 grow room

I am already going to use the 2 400 watt hps for flowering and i plan to sell the T5 + some older equip to a friend for 200 $

So my question is do you think i would get more yield if I

1) bought 1 1000 watt MH for 150 shipped to hang in the center with the 2 400 watt hps on the side

or

2) bought 2 more 400 watt HPS lamps for 215$ shipped for a total of 4 400 watt HPS lamps



so first one has 1800 watts 1000 of which comming from a MH and the second had 1600 watts but all from a HPS

so which would be better for flowering 200 more watts with more then half being MH or the mobility of 4 lamps all HPS with 200 less watts

I know the HPS has more lumens then the MH and the light spectrum is better for flowering. but the extra 200 watts still has me confused anyone know the lumen output of a 1000 watt MH and a 400 watt HPS ?

bump...........

I would say the one with more lum. per watt

ie

3,000 lumes / 45watts = 66.66 lumes per watt

bump..............

-_- I just answered your question , what ever bulb gives you the most lumes per watt is better because it will give you better results and no the lumes doesn't add up when you add more lights

im looking for more then just one persons input ?!?! sorry if i dont take your word for it stranger . I also edited my main post a little so you didn't answer everything or really anything ?. my question wasn't about the lumens it was about MH vrs HPS and wattage loss compared to the actual light. yes it is true which ever lamp has more lumens should be better but their are several factors here

Breakdancer003 said:

im looking for more then just one persons input ?!?! sorry if i dont take your word for it stranger . I also edited my main post a little so you didn't answer everything or really anything ?. my question wasn't about the lumens it was about MH vrs HPS and wattage loss compared to the actual light. yes it is true which ever lamp has more lumens should be better but their are several factors here

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If I am correct

MH gives off more of a Red Spec and HPS gives you more of a blue spec , if your just doing veg and don't have the stuff to put the light on a moving thing then I would go with the weaker HPS for veg since you can have more plants going compared to just 1 light

BCTHC said:

If I am correct

MH gives off more of a Red Spec and HPS gives you more of a blue spec , if your just doing veg and don't have the stuff to put the light on a moving thing then I would go with the weaker HPS for veg since you can have more plants going compared to just 1 light

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this is why i want second opinion you are infact incorrect. the HPS ( high pressure sodium ) gives off the red spectrum for flowering where MH ( metal halide ) gives off a blue spectrum and is best for vegitative growth.

this is why im not sure between the 2 options. 1000 watts extra of MH ( 200 more watts but less mobile and blue spectrum instead of red ) or 800 watts extra of HPS ( 200 watts less but better spectrum and mobility for flowering )

also I have them in a 4 x 4 x 6 grow tent i dont need the lights on moving rails be cause i will have 3 or 4 lights depending on which way i go so their will be 100 % light coverage

bump ................

anyone else have anything on this

2 400 watt HPS

or

1 1000 watt MH

to add to my other 2 400 watt HPS light set up for flowering

Metal halide puts out the blue spectrum best for growing vegatative growth. The hps puts out the yellow/red spectrum best for flowering.......no doubt in the worrld it is a fact that hps is the best for flowering. But i dont know if way more mh like 1000 mh may be better than 400 to 800 hps. Ive been told youd rather have 400 hps flowering than 800 mh. Its an ongoing battle. I personally am using hps. 3 100 watt lamps and a 2 tube four foot floro. I just added the hps about two weeks ago. And ive never seen growth like this even when i used two 400 watt mh lamps a couple years ago.

I saw your purple grow very impressive. i am going for a similar end result off these 6 beauty queens maybe more ? i know you started with 50 but these should be monsters so we will see how it goes. Also i think i am just going to go with the 2 400 watt HPS's for a tottal of 1600 watts HPS ( 4 x 400 watts ) in a 4 x 4 x 6 tent. That should make this season a monster. i wonder what the lumens per square foot is on this i need to find the equation 1 sec

hey dude, yea tough decision.. besides all the factors to decide involving portability and cost..etc etc and just looking at what is best for the plants as far as growing huge buds (and a lot of them) I would say my vote comes in for the 1000W MH.. because..
yes, 2 more hps lamps would produce more lumens and the right spectrum for flowering but where are the extra photons going? part of the reason why there is no upper limit to how much light per sq. foot area you put through (with the exception of heat) is because there is only so much light a plant can absorb through its leaves for photosynthesis (the rest is just wasted lumens).. but its light absorption rate is limited via # photons per frequency range.. this is the key.. if you pump out hundreds of thousands of red light photons, so what? the cells are hardly getting any blue and that spectra is open for absorbtion still so its the mix of frequency ranges that give maximum yield for sugars (which produce bud) and photosynthesis.. which is why running a mh and an hps throughout the entire life cycle is ideal.. I think that the plants would go into crazy-mutant-mode if you added a 1000W MH, your yield would significantly be increased and with 2 more hps bulbs, I fear that it just would not be worth it.. good luck!

seems like people say with the standard HPS out put bulbs you get around 50k lumens

so 200k Lumens in a 4 x 4 x 6 grow tent



16 square foot floor space 200k / 16 = 12500 lumens

thats over 1000 lumens per square inch and with 4 lights i can cover close to 100 % of the plants

nice to see some differing opinions i will look more into this a quick google search ( what i should have done befor making this my bad ) says that MH isn't the best for weight but may increase the over all potency. Since i have the 2 400 watt MH bulbs and the t5 vegging my plants right now. i think i might just go with the 1000 watt mh and the 2 400 watt hps bulbs for a good mix. spend that extra cash on a better exhaust fan for my room maybe with a carbon scrubber

yea, agree... plus then you can just keep everything on (1000W MH and your 2 HPS bulbs) for the NEXT grow (keep the hps bulbs on along with the MH during next crops' veg).. you trying to simulate, as closely as you can, the rays of the sun so the wide spectrum as well as the lumens per frequency range will always yield more healthy plants (larger and more potent harvest) .. though just as important as light, is strain.. good luck!

Wow. What school do you teach science in consciousness. Nice answer

haha, yea would be fun to teach a college course in marijuana cultivation! nah, I have a degree in physics but Im a .net programmer.. oh well .. :-/
love biology too though, if you use a torrent to search for some plant cell biology books you can learn a crap load about it . cheers..