Can I Vegetate with HPS?

hwy420 · Oct 6, 2009

Hey Everyone; I apologize for my newbiness, but I had a couple of questions.

I know that for vegetating, a Metal Halide on 16/8 light schedule is optimal.

I know that for flowering, a High Pressure Sodium bulb on 12/12 light schedule is optimal.

My questions are:
1.) Can I vegetate with a High Pressure Sodium bulb on a 16/8 light schedule?
2.) Can I flower with a Metal Halide bulb on a 12/12 light schedule?

I need to know whether or not I have to buy a 600W Metal Halide bulb to vegetate my clones for a week before putting them into 12/12 flowering. Thanks in advance!

Bob Smith · Oct 6, 2009

hwy420 said:
Hey Everyone; I apologize for my newbiness, but I had a couple of questions.

I know that for vegetating, a Metal Halide on 16/8 light schedule is optimal.

I know that for flowering, a High Pressure Sodium bulb on 12/12 light schedule is optimal.

My questions are:
1.) Can I vegetate with a High Pressure Sodium bulb on a 16/8 light schedule?
2.) Can I flower with a Metal Halide bulb on a 12/12 light schedule?

I need to know whether or not I have to buy a 600W Metal Halide bulb to vegetate my clones for a week before putting them into 12/12 flowering. Thanks in advance!

1) Yes
2) Yes

Some people say that HPS for veg makes plants stretch; I don't agree, and use a 400HPS for vegging because I like the additional lumens it throws off (no stretching problems at all).

Also, not sure where you got the 16/8 schedule - many growers use 18/6 (I go 24/0), but 16/8 is not nearly as common.

Good luck.

SCI · Oct 6, 2009

you can veg or flower with either hps and mh

707Humboldt$born707 · Oct 6, 2009

Thats all I use and if you want you can use a MH in a HPS ballast but I wouldnt go any lower than 18/6

c5rftw · Oct 6, 2009

of course you can... use more blue light in veg than red light but uses twice the red light during flowering than vegging

c5rftw · Oct 6, 2009

yah its 18/6 not 16/8

hwy420 · Oct 6, 2009

c5rftw said:
yah its 18/6 not 16/8

Awesome guys; thanks so much for the clarification! So now I know that different stages are dependent on light schedule and not the light spectrum.

YAY!!! Sorry; I made a typo with the 16/8 lol. +REP To all of you!!!!

JimmyPot · Oct 6, 2009

It was not that long ago when MH was the best lights hps has came a long way.

c5rftw · Oct 6, 2009

JimmyPot said:
It was not that long ago when MH was the best lights hps has came a long way.

for real. really the best right now... all around that is...btw, i cant stop starring at your avatar

Can I Vegetate with HPS?

hwy420

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Bob Smith

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SCI

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707Humboldt$born707

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c5rftw

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c5rftw

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hwy420

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JimmyPot

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c5rftw

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