400w hps with 400w mh (good or bad)

thumper925

thumper925

Well-Known Member
okay i have a 400w hps light and a friend it offering to sell me his with a mh buld i want to put them in a room that is 3' by 12' would it be bad to use 2 different bulbs in 1 room or would it work normally and i will have good results
 
thumper925

thumper925

Well-Known Member
even though one side would get more of one type of light than the other side would is ok?plants on both side would be the same?
 
Master Chief

Master Chief

Active Member
the plants receiving more light from the mh may turn out slightly different from the plants receiving more hps light..
if thats a problem you could occasionally move the plants around
 
Revolution101

Revolution101

Well-Known Member
or tilt your lights so they both shine over the whole grow.. dual spectrum is good for plants but yea, rotate, tilt or something so they aren't getting too much of one kind all the time.
 
Mr Green Man

Mr Green Man

Well-Known Member
Ye, I was thinking of adding a couple of 125WATT Blue CFLS to my grow.

CFL - HPS (400) - CFL

Have the two CFLs on each side real close, the 400MH doesn't quite full the space and the CFLS are pretty cheap, they would only have to produce an extra 1/2 Oz to pay for themselths. Can't decide wather to get RED ones or BLue ones.
 
thumper925

thumper925

Well-Known Member
how often should i rotate my plants if i use the hps and mh, as i read on here i see how people are writing about using floresent lights or such that are either blue or red.how does that affect the plants and should i do it
 
Revolution101

Revolution101

Well-Known Member
if you have the money for a bunch of cfls to add in there you can always go for it. also I would rotate almost every day just to keep it really even
 
thumper925

thumper925

Well-Known Member
everyday is going to be hard considering my scheadule and where the plants are.if i just didnt rotate them would it be bad? id put 10 northern lights under 1 light and 8 diesel under the other
 
Revolution101

Revolution101

Well-Known Member
well at least rotate every other or every few... just keep it even so each set gets the same amount of each type of light.
 
Revolution101

Revolution101

Well-Known Member
Buds on the ones under the MH all the time won't get as fat, and if you're vegging in there too the ones vegging under the HPS will be long and spindly compared to short bushy ones under the MH.
 
mrskitz

mrskitz

Well-Known Member
the ones under the hps will probably grow slower in veg but yeild more in flower and vice versa under the mh,,veg growth will be quicker,yeild smaller,,,,,,peace
 
H2H

H2H

Active Member
Are Mercury Vapour lights any good i ve got a 25owatt MV would it make a differrence . . . Ikm thinking of getting 3 600watt hps in the main room as my first room is just for the babies??
 
strangerdude562

strangerdude562

Well-Known Member
Try using the mh during vegetative stage and use both when in flowering, I doubt it is harmful, you'll need all those color spectrum's for better growth.
 
L

longlivemtb

Well-Known Member
H2H said:
Are Mercury Vapour lights any good i ve got a 25owatt MV would it make a differrence . . . Ikm thinking of getting 3 600watt hps in the main room as my first room is just for the babies??
Click to expand...
Mercury vapor lights are ok, you're best bet is to get the HPS with MH conversion bulbs or just and HPS/MH balast and bulbs if you can.

The problem with MV lights are that they are a little out of the right spectrum, and lean toward being too blue. If you have the money to the the HPS do it, because it will be far better than MV.
 
Day to Daze

Day to Daze

Active Member
Ive been thinking the exact same thing

is it worth runnin git if the growth will be slower/less yeald.... compaired to cost to run and the trouble of moving them around all the time..
is anyone actually practicing this method... id love to see how its set up ...
 
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