How well will a double end 630 cmh flower a 4x4 tent ?

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So I've been looking at light rails recently. Does this allow you to cut down on the number of lights you need to cover a larger amount of space? I've seen studies that say a plant doesn't need a constant high intensity of light throughout the day to grow well.. which makes sense because you're not getting constant high intensity outdoors in most cases.
Yes it does

key with a light rail is your putting this light and letting it move to focus its higher ppfd chart everywhere, in nature you don’t get constant 100% high ppfd and youll even see certain grows now they will even have in their veg a lights “on” and “off” making it so plants think it’s cloudy but awake and this makes it so they can use 2x lines with same power in their veg/mom rooms. People today are if not using too much light and this is why even in flower you’ll see stress and people over doing it.

the light rail is a very nice way to make ur light move back and forth and you could for a veg room only have one cmh in every 4x8 moving around vs 2

i know the plants can take 2, but do they really need in veg stage? Answer is yes they can but it’s wasteful . if you get a light rail make sure to buy the replacment light rail wheels . they last along time even when the light rail has to lug two heavy lights , on led’s it would be bitter and prolly never even wear em out.

if heats not ur issue i suggest using like (2) hlg 150’s vs cmh and youll get a better coverage and have em on light rail . If this is only for one 4x4 than u only need one . this year I removed all my cmh and so far it’s working ( deh pushes a lot of heat , so I don’t have to use heater)

if heat is needed when colder I’ll temp replace one of the hlg’s and put it there . Electric heaters are costly to run



 
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Yes it does

key with a light rail is your putting this light and letting it move to focus its higher ppfd chart everywhere, in nature you don’t get constant 100% high ppfd and youll even see certain grows now they will even have in their veg a lights “on” and “off” making it so plants think it’s cloudy but awake and this makes it so they can use 2x lines with same power in their veg/mom rooms. People today are if not using too much light and this is why even in flower you’ll see stress and people over doing it.

the light rail is a very nice way to make ur light move back and forth and you could for a veg room only have one cmh in every 4x8 moving around vs 2

i know the plants can take 2, but do they really need in veg stage? Answer is yes they can but it’s wasteful . if you get a light rail make sure to buy the replacment light rail wheels . they last along time even when the light rail has to lug two heavy lights , on led’s it would be bitter and prolly never even wear em out.

if heats not ur issue i suggest using like (2) hlg 150’s vs cmh and youll get a better coverage and have em on light rail . If this is only for one 4x4 than u only need one . this year I removed all my cmh and so far it’s working ( deh pushes a lot of heat , so I don’t have to use heater)

if heat is needed when colder I’ll temp replace one of the hlg’s and put it there . Electric heaters are costly to run



Appreciate the info a ton BH. I'll be using some LEDs that are pretty lightweight. Do you use the rail during flower with just one light? I have a big space I'm trying to figure out if I can use less lights even throughout flower by using a light rail. Because the amount of light I would need to use otherwise isn't ideal.
 
Do you use the rail during flower with just one light?
Not trying to butt in but lol, I have ran two DE 1000w fixtures in a 7 x 20 room on a light rail with good results. Had 33 plants in 2 gallon pots in there and got 2.6 lbs per light. I know it's not the best but this was with junky auto flower genetics that hermed out like a mofo. So with no experience growing under any hps fixtures or in that environment, I called it a success by just finishing and having some smokable product at the end. So I believe without a doubt that with good genetics and a better controlled environment it could have been way better. Can't blame the rail for sure.
 
Not trying to butt in but lol, I have ran two DE 1000w fixtures in a 7 x 20 room on a light rail with good results. Had 33 plants in 2 gallon pots in there and got 2.6 lbs per light. I know it's not the best but this was with junky auto flower genetics that hermed out like a mofo. So with no experience growing under any hps fixtures or in that environment, I called it a success by just finishing and having some smokable product at the end. So I believe without a doubt that with good genetics and a better controlled environment it could have been way better. Can't blame the rail for sure.
What kind of foot print were you covering?
 
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