400w HPS 24/7??

Marijuanaa

Active Member
Hello guys,
i aint usialy one to write in this section of the fourms but its one of those newbie questions...

I was reading a thread here and they were talking about HPS lights on for 24/7 while in veg will increase the yield, could someone tell me if this is true or not?

This is a 400w HPS and could get very hot in there, plus very expensive... would it increase the yield alot (is it worth it for the increased energy bill) or should i just run on 18/6 then go 12/12 when i think its time for flowering??

thanks guys :bigjoint:
 

KayAnow

Active Member
Errrmmm......holy poo that would be a hot lil biatch. I like to stick with the tried and true ways of our fellow ancestors...hehe. Just stick to the 18/6 and 12/12 man. Think of it this way, were tryin our best to replicate good ole mother nature.
 

Dr. Indica

Active Member
I run mine 24 hours......the longer the light is on, the bigger the plant will get....more branches = more tops = more bud

My electricity cost is around $15 -$20/month
 

Marijuanaa

Active Member
I run mine 24 hours......the longer the light is on, the bigger the plant will get....more branches = more tops = more bud

My electricity cost is around $15 -$20/month
man im doing SOG... i want small compact plants that have ALOT of bud. thanks 4 suggestion tho m8... i might stick to 18/6... unless some1 gives me a good vaild reason why i strictly shouldn't... that mother fucker is going to burn my plants unless i turn the lights off for atleast 4 hours... :bigjoint:
 

Marijuanaa

Active Member
Guys, dont plants need darkness for their hormones or something? i swear i read this somewhere because otherwise nobody would ever do 18/6...

ta ;)
 

Dr. Indica

Active Member
MJ will grow 24 hours a day, as there is no point of diminishing return. So with that in mind, if I run my lights 24/0 and you run your lights 18/6 in 30 days my plants will have a whole week's worth more of growth b/c your plants spent 180 hours in the dark....try running a test, let me know what you come back with bongsmilie :weed:
 

Marijuanaa

Active Member
MJ will grow 24 hours a day, as there is no point of diminishing return. So with that in mind, if I run my lights 24/0 and you run your lights 18/6 in 30 days my plants will have a whole week's worth more of growth b/c your plants spent 180 hours in the dark....try running a test, let me know what you come back with bongsmilie :weed:
lol mate il take ur word for it, i see where you come from but with a grow box like mine and with vents like mine, i think if i ran 24/7, either something would give (electrical), the lot will catch fire when im out or it will become up 2 90 in there :fire:

but thanks 4 info dude ;) :leaf:
 

IcantGrow

Member
lol mate il take ur word for it, i see where you come from but with a grow box like mine and with vents like mine, i think if i ran 24/7, either something would give (electrical), the lot will catch fire when im out or it will become up 2 90 in there :fire:

but thanks 4 info dude ;) :leaf:
try getting a biger exhaust fan and run 24/7 iv tryed this and yes your plants grow quicker but allso when u put them into 12/12 they will produse more clorophyll and biger buds ,i found it allso makes the stem stronger ,,,but runnin 18/6 is allmost as good ,its really about how much you want to put into it
 

Marijuanaa

Active Member
Hey guys, I thought id post this here since i answered my question and should answer anybody who is reading this questions...

Light - Plants needs a rest. Recommend 20/4 for veg. Plants do better (produce more carbos) with less light over a longer period of time than alot of light for a shorter period of time. There is a point of light saturation where more light will work against you by bleaching out the lifeblood of the plant - chlorophyll. .
This quote from Uncle Ben shows that you SHOULDN'T have your lights on 24/0... it will stun your plants and bleach our the lifeblood of the plant. your weed needs rests...

thanks guys anyway ;)
 

Bob Smith

Well-Known Member
Hey guys, I thought id post this here since i answered my question and should answer anybody who is reading this questions...



This quote from Uncle Ben shows that you SHOULDN'T have your lights on 24/0... it will stun your plants and bleach our the lifeblood of the plant. your weed needs rests...

thanks guys anyway ;)
Actually, that quote shows that Uncle Ben thinks that we shouldn't have our light on 24/0.

I've yet to hear a valid reason not to run my all day, every day, and will continue to do so.

My plants aren't stunned or bleached, nor do they seem to be telling me that they're tired and could use a nap.
 

tusseltussel

Well-Known Member
Hello guys,
i aint usialy one to write in this section of the fourms but its one of those newbie questions...

I was reading a thread here and they were talking about HPS lights on for 24/7 while in veg will increase the yield, could someone tell me if this is true or not?

This is a 400w HPS and could get very hot in there, plus very expensive... would it increase the yield alot (is it worth it for the increased energy bill) or should i just run on 18/6 then go 12/12 when i think its time for flowering??

thanks guys :bigjoint:
24/0 will not give you more yeild it will give you faster vegetative growth but you will have a healthier root ball with a dark period.......roots keep growing at night

process nutes more efficiantly
 

Dr. Indica

Active Member
Actually, that quote shows that Uncle Ben thinks that we shouldn't have our light on 24/0.

I've yet to hear a valid reason not to run my all day, every day, and will continue to do so.

My plants aren't stunned or bleached, nor do they seem to be telling me that they're tired and could use a nap.
^^^^^^^^^^^^^^^^^^^^^^

I second that motion, I will continue to run my lights 24/7 as there is no scientific reason not to.
 

Marijuanaa

Active Member
sounds like this one is a matter of personial opinion. I think il stick with the book and run my 400w HPS at 18/6 for my first grow :P just need to quiet the fans down abit since i am going to be sleeping in the same room as i grow and at the moment, the fans will keep me awake :S

thanks for your opinions guys :)
 

lukrativ

Member
according to the jorge cervantes grow bible i have in front of me,plants grow best under 24 hours of light,contrary to belief...
 

dannyboy602

Well-Known Member
Guys, dont plants need darkness for their hormones or something? i swear i read this somewhere because otherwise nobody would ever do 18/6...

ta ;)
give it a rest. 18/6 is good. think about vegging for 6 weeks and tying down stems so the side shoots will develop.
 

Dr. Jekyll and Mr. Hyde

Well-Known Member
according to the jorge cervantes grow bible i have in front of me,plants grow best under 24 hours of light,contrary to belief...
Yes you can run 24/7 but is it worth the extra electricity and reduced life span of the light bulbs
Dr. Jekyll

Our experiments concluded that 24/7 did prevail in the early weeks, but at the end of the grow the 20/4 produced the highest yield.
Mr. Hyde
 

lukrativ

Member
I'm running a 200 watt cfl for 6 hours and a 400 HPS system for 18,the plants are 5 weeks old from seed and are looking mighty fine.. i only run the cfl to give the ballast a break from constant running,cuts the bill (a bit) and give the plants a little break from the hid.. although,with my cool tube and the 400 its 24.7 c in veg which is perfect,i have no complaints... moving up to my 600 for flower :) with me luck!
 
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