help with first grow

[Guest]

hi im just setting up my first ever grow and im thinking of using 125w Fluro Environlite this comes with a 6400k vegging lamp. This is going into a closet set up that is, 23"W/58"L/23"D. has any one used these sort of fluros before any advice would be gratfully appretiated. I have started the build today and taken photos so im going to post and update on here as i go along 420 HERE I COME

 

[Guest]

whats up deviousD. i'm sure once you post some pics you will get some help. sorry never heard that light setup before.

 

[Guest]

I heard the ballast heat up and there have been fires.....Never tried them myself for that reason.I'm sure someone else will get on and dispute what I said..make sure you vent.

 

[Guest]

Thanks for your advice, any ideas on some fluros i could use in that space? im going to vent straight through the top into the loft not sure what im going to use as an extractor yet any ideas welcome

 

[BombSquadron65]

Well, don't know much about fluoros so I googled your light

125 watts, producing 8,000 lumens

source http://www.amazon.com/gp/product/B0002JL40O/103-7551301-6765436?v=glance&n=284507

You want about 5k lumens per sqft., 2.5K minimum. A 150HPS gives off 16K lumens.

When you're saying that you have a 6400k vegging lamp do you mean that you have a 90W envirolite? If so that would bring you're total lumen count to 14.4k which would equate to 3.6k/sqft. This is adequate, but you may want to consider putting yet another 90W envirolite in there during flower to increase bud density and yield.

 

[Guest]

havent yet bought anything these environlite are on fleabay they say they come with 6400k veging lamp and also 2700k lamp available as well for flowering.

 

[BombSquadron65]

Hmmm. I don't know. Do you know if the 6400K and 2700K references are to lumens? I would assume so, but it would be good for clarification. If those numbers are in reference to lumens then you'll have 8k from the enviro, 6.4k and 2.7k additional. This adds to a total of 17.1k lumens which yields 4,275 lumens/sqft. Just barely shy of the 5k mark.

The only thing is how much heat will be coming off those? That's the real question and one I, unfortunately, am unable and unqualified to answer. My personal opinion would be to go with a 150HPS and supplement with a few cfls during veg. If you wanted to you could go even higher and get a 250HPs and you'd be getting 7,125 lumens/sqft. Which is very good!

 

[Guest]

I don't mean to thread jack but bomb you seem good at math and I...am not...lol How many Lumens/sqft am I getting with a 400w mh in a grow cab that is 18 inches wide, 18 inches deep and 49 and half inches tall?

 

[BudGood2006]

Actually, the 6400K is referring to the color temperature of the light. 6400K is towards the blue end of the spectrum. 2000 is red. I believe HPS is 2000K, but I could be wrong. The 125W is referring to the wattage of the lamp. I have a 65w LOA flourescent that I bought from Home DePot. Took a little bit of modification, but it works great for vegging and clones. I would agree with Bomb, you would want two of those lights for budding.

Turkish, a square foot is 12 inches by 12 inches. So, with your measurements, you have 2.25 sq. ft. Divide your wattage of your lamp by the sq foot, and you have your watts per square foot. A 400 watt lamp would be 177 wpsf?!? wow. The height of the space isn't used in a square footage calculation, but it is for a CUBIC foot, which is an important formula to figure out volume (CO2 calculations, container space, etc). Hope that helps. Peace...

BudGood

 

[Guest]

Thanks bud my light is suppose to give 38k lumen so I have 16889k lumens per square foot hahah holy fuk is that over kill or what.

 

[BudGood2006]

Just a little. Tee hee. Better too much than not enough?

BudGood

 

[Guest423]

watts and lumens are 2 different things though, your trying to find watts per square foot....not lumens.

 

[BombSquadron65]

Turkish, a 400MH will give 36k and 40k lumens. So, since you got 2.25'sqft you're getting 16k-17.7(repeating)k per sq ft.

Shit, never mind. You figured that out already... Uh, yeah that is kind of overkill. If I remember correctly Mj can only use up to 15k and anything over that is wasted light. I might be wrnog and the number might actually be higher. I'll try and see if I can find where it's mentioned in th MJ Grower's Guide.

-edit- got tired of thumbing so I googled. found this;

But, there is a maximum amount of light that the cannabis plant can absorb. Anything beyond 10000 lumens per square foot of useable spectrum lighting will simply be reflected back.

http://www.marijuana.com/Bible.php?loc=46&id=23

Not sure if that's entirely correct. Very weel could be, but I could have swron the max was 15k. Anyways, uh... try throwing some more plants in there!

 

[Guest]

watts and lumens are 2 different things though, your trying to find watts per square foot....not lumens.

Ok den 177.7 wpsf.

 

[Makavellian]

the watts per square feet thing is pretty unreliable for different types of lights ... the plant doesnt know about watts and never will .. there is a clear difference between 50 watts of hid's and 50 watts of fluoros.. but the plant doesnt know that.. my advice is to just get as much lumens as you can in the right color spectrum for your plant. your 6400k 125w envirolite would be excellent for vegging.

 

[BombSquadron65]

the watts per square feet thing is pretty unreliable for different types of lights ... the plant doesnt know about watts and never will .. there is a clear difference between 50 watts of hid's and 50 watts of fluoros.. but the plant doesnt know that.. my advice is to just get as much lumens as you can in the right color spectrum for your plant. your 6400k 125w envirolite would be excellent for vegging.

time2unite, watts is a good rule of thumb for fluoro tubes and can work well for HID as well but lumens is the a much better form of guaging as it is much more accurate.

 

[Guest423]

hmmm never heard of that, i was taught by calculating watts.....so if my room is 7x10 and i have 286,000 lumens whats that equal? is that a good enough amount?

peace

 

[Guest]

Turkish, a 400MH will give 36k and 40k lumens. So, since you got 2.25'sqft you're getting 16k-17.7(repeating)k per sq ft.

Shit, never mind. You figured that out already... Uh, yeah that is kind of overkill. If I remember correctly Mj can only use up to 15k and anything over that is wasted light. I might be wrnog and the number might actually be higher. I'll try and see if I can find where it's mentioned in th MJ Grower's Guide.

-edit- got tired of thumbing so I googled. found this;
http://www.marijuana.com/Bible.php?loc=46&id=23

Not sure if that's entirely correct. Very weel could be, but I could have swron the max was 15k. Anyways, uh... try throwing some more plants in there!

lol thanks for the info. I'd love to throw some more plants in there but as it is I had to take 2 out and put them in my closet under cfls due to space.

 

[Guest]

hmmm never heard of that, i was taught by calculating watts.....so if my room is 7x10 and i have 286,000 lumens whats that equal? is that a good enough amount?

peace

4085k lpsf I think?

 

[Guest]

Actually, the 6400K is referring to the color temperature of the light. 6400K is towards the blue end of the spectrum. 2000 is red. I believe HPS is 2000K, but I could be wrong.

BudGood

nope thats what they mean. K is for kelvin....which is the color spectrum...I to started off using 125 cfl for growing.....then got my first 600 digital and realized I wasted so much time and money when I should have went hps in the begining........