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par light meter

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Red and Blue LED lights
... light meters are designed to measure the intensity and brightness of this type of light at the source. This allows humans to measure and standardize brightness levels from one white light to the next for easy comparison. LED Grow lights ...
http://www.rollitup.org/indoor-growing/4882-red-blue-led-lights.html
General questions about plasma light « OpenGrow tests, reviews and interviews « OpenGrow
... meter (converted to ammount of hps light), whilst sannie would use 600W per square meter normally when using HPS. 2.48 times more light. So I think It has something to do with the amount of light ... spectrum being ok for plant growth. Quote They measured PAR light. So do we. But we measure the rest too ...
https://www.opengrow.com/topic/40484-general-questions-about-plasma-light/
General questions about plasma light « OpenGrow tests, reviews and interviews « OpenGrow
... of photons in the PAR range. PPF and PPFD are measured in micromoles photons. You measure the PPFD with a quantum meter. PPF - Photosynthetic Photon Flux - ... the second is spectrum. A red or blue led for example produces 100% par light, but only in a very tight spectrum. Interesting to know is that ...
https://www.opengrow.com/topic/40484-general-questions-about-plasma-light/page__st__60
LED Grow Light Technology - Stoner Forums
... micromoles. The point at which a plant receives more light than they can utilize, is known as the Light Saturation Point. For most plants, the optimum level of PAR lighting is approximately 500 micromoles per square meter (~55 micromoles per square foot), and if these plants receive much over that, they can reach the point of light saturation. In some ...
http://www.stonerforums.com/lounge/general-cannabis-cultivation/26762-led-grow-light-technology.html
Needed lighting concepts to develop LED grow lights - The Garden's Cure
... light (lm, cd), thus they are very misleading when used for plants lighting. There is a relatively simple way of measuring irradiance with a standard luxometer (light meter) knowing the spectrum of the light ... very good. -Use of photons almost all the PAR range is similar. The curves are pretty flat, ...
http://www.gardenscure.com/420/lighting/117599-needed-lighting-concepts-develop-led-grow.html
Lighting Head Scratcher - The Garden's Cure
... light reaching the target), replaced in SI by lux (lumens/m^2). Light meters that measure illuminance in foot-candles are still used by photographers. Light meters that measure illuminance in lux are used by lighting ...
http://www.gardenscure.com/420/lighting/78740-lighting-head-scratcher.html
Mosser Lee Soil Master Moisture Light and pH Meter - 420 Magazine
... , Light & Water in 1. All I'm after is for the moisture part to check the soil. Wasnt sure if anyone could give a review. Thanks! Light meter - Eyeball unless you're riding the bleeding edge, in which case either purchase a PAR meter or borrow one from a local aquarium/reef club. Moisture meter - Finger and/or pick up the pot when ...
http://www.420magazine.com/forums/grow-supply-product-reviews/148876-mosser-lee-soil-master-moisture-light-ph-meter.html
CFL Light Tutorial - 420 Magazine
... of the light source. Lux is used to rate the intensity of the light over a specified area PAR (Photosynthetically Activated Radiation) ... light meter. When I compared some 65, 85 and 105 watt bulbs, I saw that some bulbs were putting out twice as much as some others. I never understood the meter ...
http://www.420magazine.com/forums/grow-lighting/111680-cfl-light-tutorial-5.html
Introduction to lighting. - The Garden's Cure
... measuring light. Photographers use a light meter, the lighting industry uses lumens or lux and the gardening industry uses PAR. All are only measurements; the actual light coming from a lamp or the sun does not change ~ only the methods we use to measure are different. Light Spectrums & Colours Light ...
http://www.gardenscure.com/420/lighting/80563-introduction-lighting.html
How much light during dark is too much: flowering - 420 Magazine
... to illuminate your flowering chamber without putting undue stress upon your plants. Is there any scientific data how much light (lumen or PAR) may safely reach the leaf surface and not trigger a re-veg? The hormone that causes flowering is destroyed ... that equated to a lumen or PAR rating. I just try to keep it as dark as possible in my room so as not to disrupt the cycle. It would be interesting to take a light meter outside on a full moon night ...
http://www.420magazine.com/forums/frequently-asked-questions/143764-how-much-light-during-dark-too-much-flowering.html

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