Compact Fluorescent Light Discussion

[Zandor]

well you did not say what wattage it is so I can only give you the formula so you can do the caculation yourself.

From 0-12" the lumens are the same it's from 12" to ? that it starts to go down.

Here is what you are looking for.

Lumens is a mathematical formula that measures the bulbs intensity at 1 foot. The color or type of bulb is not calculated in the formula I=L/D² Lumens received are a measured in watts-per-square foot or foot-candles. Calculating foot-candles or lux is a more accurate way to estimate the amount of light plants receive. This still only measures how much light you plants have available but not how much your plants use.

Light diminishes exponentially fast!

So how close you can place the light is really determined by the temperature at the top of your plants. 12â?� or less is all the same. So itâ??s 12â?� to 48â?� we have to balance between heat and lumens penetration and the closer to the 12â?� mark the better without burning the leaves. If there is too much heat coming from your light then add a glass heat shield and heat exhaust fans to either suck the heat our or inline to push the heat out. How long you vent tubs are will determine weather you push or pull the heat out. You are better off if you blow air through your hood. This will allow you to get the light as close as possible but watch the temperature!

[HARDDON]

THanks Zandor.

Right now I have MH and HPS about 10 inches from canopy top...

No heat glass or shield, just a fan at the bottom blowing the hot air off of them and into the top of the cabinet where the exhuast fan lies.

THanks again.

[flipwonder]

how many watts are you using for your vegging and flowering?

[HARDDON]

VEGGING

3 CFL 125W 6400K
3 CFL 55W 5500K

FLOWERING

3 CFL 125W 6400K
1 MH 250W
1 HPS 250W

I got the 3 CFL on the sides and underside of the ferns.

[Zandor]

Hey H if you have not thought of it yet why donâ??t you hang a temperature probe under your light about plant height.
Just a suggestion for you; and anyone else that grows itâ??s good to monitor the temperature there 24/7.

[HARDDON]

Temp probe looks kool....the canopy doenst look so hot...

Yea got one of those...I can keep it around 82 for the most part running at night and flowering sleep during the day.

I did buy an AC unit to stick in the box, but, I know I dont have the room I need so I might just trash this box when this is over. Never installed it.

I need a fricking room in the house to do this shit right.

This storage cabinet stuff is for the birds.

THanks Z

[hondo]

zandor is right for CO2 to be effective,u need HPS light on flowering and about 85 degrees F. Luck to ya

[BobBong]

Day 39 you can see how the stem has grown, the diameter of the stem is now about the diameter of a highlighter...

i've also cut back from 18/6 to 14/10, which it will stay like that for a week then down to 12/12 for the next 7-8 weeks..


this is gonna be a bigass plant..

[HARDDON]

Looks really nice Bong. Yup, she is gonna be good.

In looking close at pic one, I would tie down the growth now a little frther out toward the main bud part. IT appears the main kola is again facing UP.

That is cool, but I would bring it out justy a tadmore, buz you still have a lot of growth potential.

Of course it you are gonna start flower, whats done is prett much done.

Why the drop to 14/10 first, outta curiosity? To give them some height?

[BobBong]

lookin good at 46 days