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Actually not planted at the moment. Hope to be soon. Many factors as anyone in the hobby knows. I do have a grow tent I use for veg until flower stage, and then it becomes my flowering point, unless a decent sized closet is available. When I was in the high desert it was easy to keep humidity in the single digits. Where I'm at now I need a dehumidifier to keep it below 30 in flower. Generally, in veg I like humidity 50-80%. Cloning, and babies 80-90% humidity. Blooming as low as I can get it. Veg temps 65-100f. Flower 55-100f.How's the temperature and humidity in your place you're planning to grow?
Actually not planted at the moment. Hope to be soon. Many factors as anyone in the hobby knows. I do have a grow tent I use for veg until flower stage, and then it becomes my flowering point, unless a decent sized closet is available. When I was in the high desert it was easy to keep humidity in the single digits. Where I'm at now I need a dehumidifier to keep it below 30 in flower. Generally, in veg I like humidity 50-80%. Cloning, and babies 80-90% humidity. Blooming as low as I can get it. Veg temps 65-100f. Flower 55-100f.
Currently in a high humidity area. Not so much in the winter, but summer humidity is easily 70+% in summer. My understanding is that plants make more resin in lower humidity to mitigate water loss. So while blooming the lower the hummidity the better. Otherwise, higher humidities are great for vegetative growth. Unless I've miss guessed what RH is.
There's all different terminology used, and misused when talking lights. I totally agree with that. Having watched dozens of videos where people have actually tested the claims of manufacturers I can safely say correct terms are almost never used by them. While par is a measurement of the 'photosynthesis active range', what the individual plant wants changes. Lumens is a term that can be easily tested and verified.Just going to put this out there...plants don't react to lumens..lumens are for human eyes not plants..you should take the word right out of your vocabulary for grow lights...your after a Parr reading..
There's all different terminology used, and misused when talking lights. I totally agree with that. Having watched dozens of videos where people have actually tested the claims of manufacturers I can safely say correct terms are almost never used by them. While par is a measurement of the 'photosynthesis active range', what the individual plant wants changes. Lumens is a term that can be easily tested and verified.
It's kind of like 'organic'. Manufacturers slap it on the box and charge more.
Just going to put this out there...plants don't react to lumens..lumens are for human eyes not plants..you should take the word right out of your vocabulary for grow lights...your after a Parr reading..
Lumens are for humans my friend.Wrong. Just wrong...
Lumens are definitely used buy the plants. A lumen is just a measure of light.
There is no way to have lumens that plants dont react to. I suggest learning more about light and how it works.
This is bad information to be giving to people.
Lumens are for humans my friend.
That is a measure of light for sure but a poor measure for plant lighting looking toward PAR is way more effective and accurate
Lumens however can give you an overall rating of light intensity
Not why I started the thread. But 'lumens' is a measure of light intensity. 'PAR' is a graphic measure of color spectrum emitted. Plants use more Red and Blue than Green. They also can use some non visible spectrums. But to grow a plant requires a minimum amount of lumens, the more the better to a point. And it also requires PAR values to a point. But most White Light contains all necessary PAR values, so it then simply becomes a matter of lumens generated. A 1000w HPS bulb can put out 110,000 lumens. And depending on the PAR values can be a better or worse bulb for growing plants. PAR is spectrum ranges. Lumens is intensity.
No arguments with this. It's science. What it doesn't say is that you need to spend hundreds of dollars on grow lights specifically.In another information article on this site we discuss lumens and how they affect plant growth, but you should be aware that a lot of scientists would argue it’s not the lumens that affect plant growth at all – it’s the PAR (photosynthetically active radiation). Understanding the difference between the two different methods of measurement may seem like nit-picking, but it’s not really. If you’ve read up on this topic you might be forgiven for thinking that they’re one and the same thing at first glance but, like any other information, it takes a while to process.
There really are a lot of terms that you need to get familiar with if you’re going to start a successful grow operation of any size, but taking the extra time now to figure all this out will pay dividends for you in the future. We’re going to take a closer look at exactly what the difference is between PAR and lumens and how this might affect your grow operation.
So What Is a PAR?
Essentially a PAR is the amount of light that is actually available to be used during the photosynthesis process. There may be more light emitted from a particular source, but your plants don’t make use of all of it – some of it has no real effect on the photosynthesis process. It might be best to explain this with an example. For the human eye a bright white or yellow light bulb seems to illuminate the room most effectively, whereas blue or red light appears to our eyes to be very dim and so for us we prefer the brighter bulb to light up a room.
The lumen is a measure of brightness or how much light is actually emitted from any particular light source at a given time. Unfortunately, plants don’t really use that bright yellow light for photosynthesis, and while your traditional light bulb may be high in lumens it won’t necessarily be very high on the PAR scale. Plants experience the best growth when exposed to both blue and red lights and this type of light, while still visible to the human eye, is better measured in terms of PAR’s than lumens. As part of the visible color spectrum blue and red light is found between 400nm and 700nm and as you approach 700nm the PAR exposure increases. As a plant grows from a seed to a mature plant its need for light shifts from the blue to the red end of the spectrum, and you can measure how much exposure to light it’s getting in nanometers by using special instrumentation – the closer the light gets to 700nm the higher will be the PAR reading. As long as you keep your plants exposure between that 400nm and 700nm range at the appropriate levels for each stage of the plant’s growth cycle, you’ll end up with healthy and productive plants.
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