HPS for veg?

Gquebed

Gquebed

Well-Known Member
So i have read twice now, in a couple magazines, that HPS may be better for vegging. The argument for it is that HPS is more efficient in terms of lumens and they have enough blue in the spectrum for vegging?

Thoughts...????

It appeals to me just because the 8" fan that i have cooling my 2 lights sucks so much air through the hoods that it causes too much neg pressure and i have to tape them up. If i ran the HPS for vegging i wouldnt have to peel tape to swap out....
 
MammothGrow

MammothGrow

Well-Known Member
this thread should be in the Growing Equipment i believe, but anyway, I veg with my Hortilux Super HPS 1000 watters in my room, you can check out my grow journal to see. They work just fine and I dont have to buy MH's to run for veg, saves some money! I've used a MH to veg my mothers up but didnt really notice any big difference between it and vegging under my HPS's, so i just stick with the HPS's, . As you can see in my journal they work just fine and dandy for vegging. :)
 
Gquebed

Gquebed

Well-Known Member
MammothGrow said:
this thread should be in the Growing Equipment i believe, but anyway, I veg with my Hortilux Super HPS 1000 watters in my room, you can check out my grow journal to see. They work just fine and I dont have to buy MH's to run for veg, saves some money! I've used a MH to veg my mothers up but didnt really notice any big difference between it and vegging under my HPS's, so i just stick with the HPS's, . As you can see in my journal they work just fine and dandy for vegging. :)
Click to expand...
Post a linky ??
 
Corso312

Corso312

Well-Known Member
Gquebed said:
So i have read twice now, in a couple magazines, that HPS may be better for vegging. The argument for it is that HPS is more efficient in terms of lumens and they have enough blue in the spectrum for vegging?

Thoughts...????

It appeals to me just because the 8" fan that i have cooling my 2 lights sucks so much air through the hoods that it causes too much neg pressure and i have to tape them up. If i ran the HPS for vegging i wouldnt have to peel tape to swap out....
Click to expand...



Tape them? To slow down the cfm's ? Just use a piece of cardboard cut to cover half of the flange .
 
Gquebed

Gquebed

Well-Known Member
Corso312 said:
Tape them? To slow down the cfm's ? Just use a piece of cardboard cut to cover half of the flange .
Click to expand...
No no....i dont want to cut cfms....need that to cool the lights...

The problem is at any cfms the hoods leak...so tape seals up the leaks...
 
hotrodharley

hotrodharley

Well-Known Member
Gquebed said:
So i have read twice now, in a couple magazines, that HPS may be better for vegging. The argument for it is that HPS is more efficient in terms of lumens and they have enough blue in the spectrum for vegging?

Thoughts...????

It appeals to me just because the 8" fan that i have cooling my 2 lights sucks so much air through the hoods that it causes too much neg pressure and i have to tape them up. If i ran the HPS for vegging i wouldnt have to peel tape to swap out....
Click to expand...
My experience is they stretch fast, take at least a week to 10 days longer to finish flowering but the yield is slightly better. In fact I am preparing to do just that in a grow for a MMJ patient I'm setting up for him. He has a HPS given to him.
 
SPLFreak808

SPLFreak808

Well-Known Member
I use/used both. Hps works fine, but definetly noticeable! One things for sure, i wil never ever veg sat blue dreams under HPS ever again!
 
ttystikk

ttystikk

Well-Known Member
HPS works fine for veg. Been doing it for years. Pre bloom they like some more blue in the spectrum, so I run an 860W CDM with an HPS and they love it.

Then I bloom with all 860W CDM, no HPS at all.
 
TheChemist77

TheChemist77

Well-Known Member
if running regular seeds,, ive always had a better female to male ratio under metal halides..i think its the blue spectrum that promotes females and definatly less stretch,, but ive used both and other than the seed ratio and stretch hps does fine for both veg and flower.. personally i feel using both is best wether veg or bloom but in straight veg to flower tests yields wer within about 1 0z overall using hps for both wile mh all the way lost , wen compared to mh in veg then hps for flower yields wer same as straight hps.. however mh in veg and both in flower yielded far better than either alone...
 
Alienwidow

Alienwidow

Well-Known Member
Lots of people run hps in the last half or so of veg.i havent heard this mentioned yet, but an hps bulb runs a lot more blue if you dim it down with a dimmable ballast. 1k runnin at 6 hundo is a decent veg. I think the height of the plant is more determined by the proximity to the light in veg rather than the side of the spectrum your running.
 
MammothGrow

MammothGrow

Well-Known Member
Gquebed said:
Ahhh....

Wow. Monster scrog. Very well done. I've a couple small ones. not to jack my own thread but.... with all those how do you trim underneath and water them???
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I set up cinder blocks, tall way, and laid 2x4's across them and put the trays on top of them so they can slide side to side in the room. The back rows have an extra piece of trim board on the 2x4's so the trays are slightly tilted forward so all the water runs down to the drain holes. Also allows me to put a 5 gallon bucket under each tray to catch the runoff when i water. The room is 18' wide, 3 trays wide is 12', so i have an extra 6' to move the trays back and forth to get in between them and prune, water, whatever, allows me to easily access every part of every tray :)
 
Gquebed

Gquebed

Well-Known Member
MammothGrow said:
I set up cinder blocks, tall way, and laid 2x4's across them and put the trays on top of them so they can slide side to side in the room. The back rows have an extra piece of trim board on the 2x4's so the trays are slightly tilted forward so all the water runs down to the drain holes. Also allows me to put a 5 gallon bucket under each tray to catch the runoff when i water. The room is 18' wide, 3 trays wide is 12', so i have an extra 6' to move the trays back and forth to get in between them and prune, water, whatever, allows me to easily access every part of every tray :)
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Hmmmmm......thanks for the idea....lol
 
TheChemist77

TheChemist77

Well-Known Member
i always had tighter node space under mh, more height under hps.. so i stuck with the standard mh in veg, both in flower..but i recently switched to cmh lamps in my flower room, my first run is just finished and im trimming,,i bet i get better than a gram per watt even with not vegging long enough..i was prepared for stretch and quickly found the new lamps need more veg time as there is very little stretch in flower..630 watts over a 4x6 table did very well, next run im upping it to 3,,315 watt cmh's over the table and vegging an xtra week.. im trying to decide on wether or not i should switch my veg room from mh to the cmh lamp too? i just popped some seeds and ive always had great female ratios under mh,, so not sure if i should wait till i sex them, then change lighting??

i have 4 315watt cmh's, 4 600 watt dig ballast n hoods.s, 4 400 watt dig ballast n hoods, 1 1.000 watt ballast n hood, pluss 2 150 watt cfl's and 4 4't5's.. have no idea what to do with all these lights if the cmh's do as i hope...last months electric bill was half my norm and so far im happy with the cmh lamps production,, big buds, better crystals, tighter node space,,,really happy...
 
oilfield bud

oilfield bud

Well-Known Member
TheChemist77 said:
i always had tighter node space under mh, more height under hps.. so i stuck with the standard mh in veg, both in flower..but i recently switched to cmh lamps in my flower room, my first run is just finished and im trimming,,i bet i get better than a gram per watt even with not vegging long enough..i was prepared for stretch and quickly found the new lamps need more veg time as there is very little stretch in flower..630 watts over a 4x6 table did very well, next run im upping it to 3,,315 watt cmh's over the table and vegging an xtra week.. im trying to decide on wether or not i should switch my veg room from mh to the cmh lamp too? i just popped some seeds and ive always had great female ratios under mh,, so not sure if i should wait till i sex them, then change lighting??

i have 4 315watt cmh's, 4 600 watt dig ballast n hoods.s, 4 400 watt dig ballast n hoods, 1 1.000 watt ballast n hood, pluss 2 150 watt cfl's and 4 4't5's.. have no idea what to do with all these lights if the cmh's do as i hope...last months electric bill was half my norm and so far im happy with the cmh lamps production,, big buds, better crystals, tighter node space,,,really happy...
Click to expand...

Thats awsome to here, I have been looking into investing in a large bulk order of cmh lights.
 
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