1000w hps or 400w mh for veg?

[Father Nature]

Iknow the more light the better but mh is better for veg.i have both lights,first grow veggin now hps is just sitting there waiting for bloom.should i use it instead of mh.

[Reverend]

If you are in veg, the MH is better. You haven't stated the size of the room. There is a room calculator here which maybe useful to you.

 

https://cannabis.community.forums.ozstoners...rs/lighting.php

[biggerbuds]

use both lights together if your room is big anuff and you have the money to run them both, but as gills said depends on how big room is & how many plants you got & how big,room temp all come into play

 

[wrp10]

Regardless of the room size wouldnt the hugely increased lumens from the 1000w be more beneficial than the more suitable spectrum yet less light produced by the 400w? Edited February 17, 2009 by wrp10

[Father Nature]

I have a 5x5 room heat is not an issue and no i dont want to run both lights.i have 6 plants 5weeks old

[Father Nature]

what wrp10 said is what im askin.

[Vdubz]

For a room that size you could use both easily.

 

Blue spectrum from MH is better for grow but I and many others have done grow with HPS.

[Innocent criminal]

Start em under the 400w m/h, then add the 1000 for 12/12 and run them both. That is when the step up in light will make a huge difference, 1400w of flowering loveliness. (if it was me I'd get another of each and go 400 for a while, step up to 800 for 2 weeks, go into 12/12 with 1000, then add another for the last 4/5 weeks, steppin up is the way to go).

 

THC

[Teucer]

Father Nature,

 

I know what you're asking. I will provide an answer. Perhaps some people should pay just a little more attention to the question

 

The 1000w HPS system is a much better option. The MH is a better vegging light and the HPS a better blooming light. But if for some reason you can only use one (which I gather, since the folks telling you to use both didn't satisfy you), then use the HPS.

 

Remember though, both forms of HID can be used for both vegging and flowering. Although the MH outdoes the HPS for foliage growth, the extra 600w and immensely increased lumens has an enormous advantage over the 400w.

 

Don't despair for the MH though - you can still using for clones, seedlings, etc. In fact, until the lil tackers have at least 3 nodes/4 leaf sets, I wouldn't use the 1000w - it may be a little too powerful. But once this stage has been reached (6-10wks depending on strain), switch over to the 1000w

 

I hope this makes sense. You might wanna read "The Cannabis Grow Bible" by Greg Green. He puts this down simply. I've got a copy if you're interested. PM me.

 

And finally, if there's any possibility of using both, THAT is the best option.

Edited February 17, 2009 by Teucer

[Father Nature]

Finally,thanks teucer.On the mh for clones thing,when can i put clones under 400w mh.Took cuttings 7 days ago,under dome,out of direct light now.and how long from cutting to flower room Edited February 17, 2009 by Father Nature