LUMENS/SQ.FT. required for stealth grow?

[onthedl0008]

Just wanted to know.... The reccomended WATTS/SQ.FT is 40-50..

How many total LUMENS does 1 watt equal =?

 

[onthedl0008]

Nobody knows how many lumens 1 watt equals?

 

[KushKing604]

minimum 3000 lumens per square foot 5000-6000 for ideal growing you dont go by wattage per square foot just lumens

 

[Cr8z13]

Different types of lights have varying degrees of efficiency. Some output more lumens per watt than others.

 

[onthedl0008]

YUP Im just going to try and stick with the 40-50 watt per square foot thing... When ever compensating for lumensXBulb type ive had negative results in yield @ harvest.

 

[carcass91]

i just have about 46-50 watt per sq foot

 

[carcass91]

to be precise, i have 9 X 23 watters and my grow area is like 4.5 sq foot

 

[UberSmoker]

I'm currently using an LED bulb for initial vegging on my first grow, but when the seedling is more mature and repotted I have three 400 lumen CFL bulbs. Will they do? This is a stealth PC...Apple Mac grow. Should I invest in a higher lumen output CFL or add more lower lumen bulbs? Sorry not meaning to hijack the thread

 

[carcass91]

get 1450 lumen cfls man..

 

[UberSmoker]

Cool. But I can't seem to find any that are much higher wattage. The ones I have are energy saving because I read that it helps in terms of both electricity and light distribution. Are there any energy efficient lightbulbs that output enough lumens?

 

[homegrwn]

dude the 27 watt daylight cfl have about 1600 lums each.. one four foot shop lights puts out 5000... a 400 watt hps puts out over 10,000. the 9 watt cfl are 400 lums and not nearly enough even in the smallest space to grow mj and have a finished product. granted you can get it to grow slow and spindly but it wont bud ever!......

two 27 watt daylight cfl over the plant even in a 2ftx2ftx2ft box will grow suprisingly well.. it wont get tall but nice and bushy... keep in mind the more space the more watts simply to cover the area provided...

Home Depot and lowes...

Walmart may not carry the daylight version of cfl's

Daylight =6700k light temperature= vegging

Brigt White=5000k light temperature=full spectrum or both veg and flowering substitute

i was reading that in a 2x2x2 box stealth grow you can get away with about 25 watts per sq ft. but thats if you have the environment correct including reflective walls and the right humidity and temperature...

Soft or warm white= 2300k light temperature= Flowering

 

[onthedl0008]

https://www.rollitup.org/newbie-central/126559-newbie-answers-lighting-hpsvscfl-during.html

I would Not reccomend to anyone in flowering stage to put a single cfl over there plants.. I did a side by side comparison grow and well the very first post in the thread above explains it all...

Yes U can veg short bushy plants to any desired hieght using 65k Daylight cfls,, Its what im currently doing but it takes longer lol.. Im only using the cfls because my True blue (actinic) Spectrum halide overgrows and stretches my veggies to hard and fast before i can get them into the flower room.

 

[ODGROP]

Umm all good points but a 400w HPS puts out 50,000+ lumens

 

[onthedl0008]

Umm all good points but a 400w HPS puts out 50,000+ lumens

I dont think it has a whole lot to do with lumens/sq.ft. myself...

I think what I should really be worried about is:
Total Watts/sq.ft.X Total spectrum/lumens of light source @ plants different life stages of growth..

And the Spectrumxlumens/sq.ftXlight source...

With that being said, Yes plants do use all light spectrums to grow obviously.With enuff light of any type i suppose u could grow a plant to smoke. But thru out a plants life span It grows and matures during the seasons of its environment. Whether next to the equator or not it all comes down to light being bent by the distance of the earth from the the sun that creates spectrums when it enters our atmosphere and distance from the sun also creates these seasons naturally.
Its been scientificaly proven that plants use mostly blue light spectrum (actinic ) to be exact,found in alot of m/h bulbs during early stages of life also found during seasons of spring and summer and fall. This spectrum is also found in hps and that cfl only tries to mimmick but works great if ur doing a stealth grow.
Its also been proven that during a plants latter stages of life adolescence, puberty and maturation.That a plant uses more Red light spectrum to mature and reproduce Which happens during fall and winter when the distance of the sun from the earth is greater.


Hope this helps peeps out making decissions when building a grow.


Stealth growers should be concerned with this as well:

Growth Production and Light emittence= Quality and Quantity+time
Time=money Devided by light eficiency and quantitiy.

Blue spectrum ( cfls m/h )= growth for veg
Red ( hps ) spectrum= Reproduction and maturation x quantity for flower

PEACE

 

[ODGROP]

I was just correcting homegrwn when he said that 400w HPS puts out over 10,000 lumens.

 

[onthedl0008]

72 Watt same as 425 watt hps sold at home depot only puts out about 10,500 lumens but takes up about a quarter of the space and heat conducted by the equivalent amount of cfls it would take to reach that many lumens...

Maybe he was talking about that?

 

[ODGROP]

That math doesn't add up at all, do you have a link to this 425w HPS bulb that only puts out 10,000 lumens? I could believe a 100w putting out that much but a 425W that has to be a really shitty light. I would also like a link to this 72w CFL that puts out that much lumens by my guesstimate a 72w CFL should only be putting out about 5000 lumens.

 

[onthedl0008]

LOL WE are talking about "SAME AS". In my hpsvscfl thread I did explain how a true 400 watt HPS Does put out anywhere from 40 to 53,000 lumens...THE hps fixtures explained above are Same As meaning not the same.
Yes the math is not going to add up cuz of the total watt output of the bulb the fact is that they put out the same light SPECTRUM as a true hps lamp..

And once again they take up 1/4 amount of spaceXheat output than the equivalent amount of cfls to match the lumens..

CFLS shouldnt even be mentioned in comparison to HPS or M/H honestly since they are only the next step down.....
Trying to mimmick true light spectrumXLumens output of HPS and M/H lamps ...

Which are only trying to mimmick the true output of Natural light spectrumXlumensXtotalsq.ft created by the sun...

Hope that helps.

 

[ODGROP]

LMAO, your still confusing the shit out of me but thats ok, cuz I don't use CFLs anyway.

 

[onthedl0008]

LMAO, your still confusing the shit out of me but thats ok, cuz I don't use CFLs anyway.

Yea IM kinda confused to but im always doing that to myself.. Is that grow in ur journal new?