I think this is enough .....
I do agree with you. Those are the most effective way

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I am confused I am starting a grow box that is 24" High and it is 14"wide and it is 10" deep. How many lights do you think i will need and what sizes I want to do cfl. Please help I am trying to figure this out but it seems the more I learn the more confused I get. And yes I am a Newbie. But trying to learn this so I can have some good Herb.

just woundering if this is good to start off with i got 4 27watts which =100watt energy saver bulb the lumens are 1400 each day lights and i have 2 42w=150 soft white and produces 2600 lumens each .

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If a light says that it puts out 2155 and you add another one do you add those and then would that be to much lumens or can you use two of 2700 or do you have to get two that equal the 2700 I am confused please help

Wow...

Well,i spent all day yeasterday reading the CFL advantages v disadvantages sticky (if you dig splitting migranes i strongly recommend Lastfrontiers posts) and guess what...im still miffed.

Ive juggled the stats every which way you can and i can only come to one conclusion: HID kicks CFLs ass.

Fewer watts with more lumens surely beats more watts with fewer lumens? Eg, if i put a 250w limit on my light wattage cos i dont want a huge leccy bill, 250w puts out 30,000. Within this wattage, 6 x 42w CFL = 252w giving 16,200. In my 2 x 3 ft closet, 250w HID = 5000l per sq/ft, happy girls, 252w cfl = 2700l per sq/ft, below the absolute minimum recommended by most growers....

From what ive read, cfls are only worthwhile if a) youre in a position to reach a good lumen output regardless of the fact that you'll need almost double the watts to do so or b) in a cutting/clone room where light doesnt need to be so strong.

L8rs guys

Hi everyone, I'm about to start my first grow and I'm a little lost right now because my plans just went through a major change. I was going to use CFLs but I'm hearing way too many reports of light & fluffy buds. It could be just bad placement of or the wrong ammount of bulbs being used, but I can't afford to take the chance on this grow.

I'll be growing in a walk in closet and I don't really have to worry too much about the smell. I'll have 2 fans at the closet door for ventilation, 1 low pointed out & 1 hi pointed in. I'll be growing 2 Sour Diesel, 2 Citrus Diesel, & 2 Grape Ape plants, and I'll be using a topping technique that will produce up to 4 colas per plant. I'll be setting up in the middle of the empty closet and the set up I'm thinking of are two rows of plants with a light above them and 1 more light on either side (for side growth) for a total of 3 lights.

I just have a few questions and you guys really sound like you know lights.

Will 3 lights produce too much heat in a walk in closet? (approx 84" x 56", approx 8' ceiling).

If 3 isn't too many, would you please recomend a good light to use that will give a good grow without being overkill?

If 3 is too many, would 2 work better hung above the plants, slightly out to the side, and angled at a 45degree angle in toward the plants (adding foil covered cardboard to help light exposure to the side of the plants)?

If 2 is a better set up for 6 plants, can you suggest a good light that will give a good grow without being overkill for a 2 light set up?

I appreciate any help you can give me.

P.S. Money is an issue right now, so I can't afford any whistles or bells. I'm just looking for a good yield and good quality.

awesome thread...great info

its's all about the color spectrum????

If u no any 1 that's lookin 4 a great grow box I have a Bloombox 4 sale. Only 10 months old and works perfect and still looks brand new only askin $2500. Comes with tubs and Connoisseur A and B Nutrients!!!!!!!!

"PAR" Photosynthentic Active Radiation for plant growing is a measurment of this energy being delivered/ Actual light intensity in the 400-700nm wavelenght band. The number from 2000 the sun to 0 no light energy at all is expressed as or in microEnsteins per second per square meter being delivered from your light source. This way tells us easily just how much of this energy the plant needs is in the lights we are using. For growing I believe this type of meter is the very best tool for measureing light. They will tell you exactly where your plants will thrive and or just survive from a lighting perspective of coarse.

Everything you are showing is a good estimator for lights that shine in 360 degress. It your using LED lights your dealing with a directional light and LEDs work more light painting with light vs. filling the room full of it as HPS and CFL do. This is where a PAR meter can be a great tool. Understanding the complete story is to also understand how your light source is going to deliver the energy it has to give. I believe this is where most of the stories about LED not being able to penatrate the plants come from. Light does not work that way. It goes where ever it wants to but the further away from its source the less dense it becomes. Good reason to have a PAR meter to be sure and check you are getting that energy to all the spots you need it. You can start to make your operations much more efficient once you understand this. The way we grow now we waste much of this energy all over the room vs getting it to the plants. This is why I know that LED in time will over take all growing. Economics always has its say in things.

Bob