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light intensity lux

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lots of very good info about lights (must read)
... of marijuana lighting are sodium or metal halide high intensity discharge (HID) lamps. Metal halides are strong in the blue spectrum of light and are good for growth. Sodium lights are strong in the red spectrum of light and are good for flowering. High intensity lights also ... lamps (including grow-lux, vitalite, etc.) are much less efficient than a standard fluorescent, and just do not put out enough light to be useful. The slightly different spectrum produced by these lamps does nothing for most plants. High intensity discharge lamps are ...
http://www.rollitup.org/newbie-central/192550-lots-very-good-info-about.html
Should I Buy This Light? Help a noob please.
... , HOW MANY 200 Watt CFLs not now many shit small light bulbs , And lumens is the intensity of a light from how strong it is lumen s has a direct ... perceive. You can measure lux from a heat source, either by measuring what is in the visible spectrum in the same way that light bulbs are measured, or ...
http://www.rollitup.org/newbie-central/451341-should-i-buy-light-help-4.html
First time grower needs help with lights
... bulbs as close to the foliage as possible and this will increase the light intensity percieved by the plants. cfl's drastically lose their strength with every inch ... the plant) (I may be mis-using lumens rather than lux, dont quote me) so put your lights as close as you can but dont let them scorch ...
http://www.rollitup.org/newbie-central/482871-first-time-grower-needs-help.html
Newbie lighting lumens per square foot question
... intensity for coverage of outlying areas? I sense this requires things I forgot from calculus. Any of you out there have a meter and if so, how do you use it to set your light ...
http://www.rollitup.org/newbie-central/5100-newbie-lighting-lumens-per-square-2.html
Right im getting pissed about The FLUX
... the more light the bigger the soure of light is coming from. and to end this. i know it doesnt increase the light intensity in the eyes of lux and you but in real life. the a plant will Grow bigger with 5 lights at the ... mayb in a lux's view but you cant say what your saying for a plants point of view. so is it true to say a plant on average wouldnt grown bigger if the sun had the same light intensity but 2 times ...
http://www.rollitup.org/newbie-central/75270-right-im-getting-pissed-about-2.html
"growing plants taller than 12" before flowering is incorrect". Is this true???
... light we humans see is measured in variety of measurement units, such as lumen, foot-candles, lux, candlepower, etc. Biology taught that plants use light ... light, is subject to Newton's Inverse Square law. This law deals with intensity and in regards to light it would mean is that the lights intensity ...
http://www.rollitup.org/newbie-central/9286-growing-plants-taller-than-12-a-6.html
How close is to close (for the light)?
... intense heat. It does limit the outer reaches of the light and points the intensity to the middle of the light ...
http://www.rollitup.org/advanced-marijuana-cultivation/269363-how-close-close-light-4.html
Contemplating a light mover... worried about watts/sq. ft.
... full strength of the light when it's at the other end but perhaps this is a red herring of sorts. Although the will have less time under the lights, the intensity will be higher. So maybe total lumens or lux per day would be a better way to look at it. Nobody elese? When I started back at her 10 years ago I bought light rails and used ...
http://www.rollitup.org/advanced-marijuana-cultivation/394934-contemplating-light-mover-worried-about.html
Contemplating a light mover... worried about watts/sq. ft.
... full strength of the light when it's at the other end but perhaps this is a red herring of sorts. Although the will have less time under the lights, the intensity will be higher. So maybe total lumens or lux per day would be a better way to look at it. Nobody elese? When I started back at her 10 years ago I bought light rails and used ...
http://www.rollitup.org/advanced-marijuana-cultivation/394934-contemplating-light-mover-worried-about.html
T 5 from Start to Finish
... lux or ~100 watts/square meter before beginning to exhibit saturation effects. Thus, most plants can only utilize ~10% of full mid-day sunlight intensity ... laboratory test results using limited illumination. [5] Only if the light intensity is above a plant specific value, called the Compensation point ...
http://www.rollitup.org/advanced-marijuana-cultivation/435839-t-5-start-finish-10.html

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