Is 113k lux too much ?

S

Smokeytit90

Active Member
Light is 30" above canopy and lux at canopy is 113k .

Too much ? Diminishing returns ?

I assume it's unnecessary. Lights of this strength will cover top to bottom of tall plants .

So shorter plants 113k lux Is overkill?
 
Star Dog

Star Dog

Well-Known Member
Smokeytit90 said:
Light is 30" above canopy and lux at canopy is 113k .

Too much ? Diminishing returns ?

I assume it's unnecessary. Lights of this strength will cover top to bottom of tall plants .

So shorter plants 113k lux Is overkill?
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Are you using a phone app for your figures, the readings don't tally ime?
 
Rurumo

Rurumo

Well-Known Member
Smokeytit90 said:
Light is 30" above canopy and lux at canopy is 113k .

Too much ? Diminishing returns ?

I assume it's unnecessary. Lights of this strength will cover top to bottom of tall plants .

So shorter plants 113k lux Is overkill?
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What light do you have?
 
jfarrismu

jfarrismu

Well-Known Member
Smokeytit90 said:
Light is 30" above canopy and lux at canopy is 113k .

Too much ? Diminishing returns ?

I assume it's unnecessary. Lights of this strength will cover top to bottom of tall plants .

So shorter plants 113k lux Is overkill?
Click to expand...
113k lux is way too much. You want like a max of 85k lux for flowering. More like 70k max for veg. Some won't even tolerate that much, and some can tolerate more. But good on you for measuring your light levels, not many do that.
 
Jjgrow420

Jjgrow420

Well-Known Member
What's so funny @jfarrismu ?

Lumens and lux refer to light intensity as it is perceived by the human eye. PAR, on the other hand, tells you something about the quality of light as plants perceive it.
Think of it as a dog whistle. If you bought a dog whistle based on what your human ears could hear, you’d end up with a pretty ineffective purchase. A dog whistle isn’t made for your perception, so it’s a mistake to judge it that way.
LED grow lights work the same way. In many other lighting applications, we talk about lumens and lux because we usually use lights to see. But when you’re selecting grow lights, your top priority must be your plants’ perception. You need to understand lumen, lux, and PAR differences so you can choose a light that emits photons your crop can use.
Source: https://news.californialightworks.com/understanding-lumens-lux-and-par-differences-in-grow-lights/

Lux doesn't mean shit. Want to measure your light intensity? Use a proper par meter. Do you measure yards on a football field in watermelons? 'and the play stops at the 50 watermelon mark'. Using the right tools will get you proper readings instead of measuring irrelevant (and inaccurate) lux readings.
I'd expect there to be a lux reading on a reading lamp. Not a grow light.
Still laughing? Or does that go way over your head?
 
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GoatSoup

GoatSoup

Well-Known Member
Lux vs PAR, try your Lux meter in noonday sunlight and what do you get? I have a candlepower meter, which is the foot vs Meter and works out the same. Sure the PAR value will be different as It measures different spectra, but intensity is intensity. Try direct sun and get an idea what direct sun measures with your meter and then adjust your lights for the same value for "One Sun" or less
My CP meter measures one Sun to be ~ 20,000 CP. calculated differently ( for Meters) it comes out the about the same in Lux. Your meter may tell you different, but at least you'll have a measure to guide you on intensity.
 
xtsho

xtsho

Well-Known Member
I've been growing for decades and have never bothered to measure anything.

I have used this chart just for reference though. That's as far as I care to worry about anything. And I'm not going to bother with some crappy phone app that could be +/- 30% accurate. I really don't care though. I just stick my plants under the light and they get what they get. If I was growing a larger commercial operation then I would care. Hobby growers growing in a tent those things are more just to fiddle around with than anything else.

I don't take notes or follow a feed chart either. Well I do take notes but only related to breeding projects so I can keep track of the genetic lineage. I don't understand why people growing a couple plants worry so much about things.

Plant-grow-harvest. It really is that simple.

 
S

Smokeytit90

Active Member
xtsho said:
I've been growing for decades and have never bothered to measure anything.

I have used this chart just for reference though. That's as far as I care to worry about anything. And I'm not going to bother with some crappy phone app that could be +/- 30% accurate. I really don't care though. I just stick my plants under the light and they get what they get. If I was growing a larger commercial operation then I would care. Hobby growers growing in a tent those things are more just to fiddle around with than anything else.

I don't take notes or follow a feed chart either. Well I do take notes but only related to breeding projects so I can keep track of the genetic lineage. I don't understand why people growing a couple plants worry so much about things.

Plant-grow-harvest. It really is that simple.

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h
My focus is on what's cost effective as well as not using note energy than I actually need . My light has no light guage just a dial . A killowatt meter will be next , but that crappy phone app my just save me money as I don't need a kilowatt meter now .As a new grower my focus is on getting a feel for my set up and dialling in how I want to use it for future grows . Got some light burn so light intensity is too strong . Not shelling out 100s for something I can get a general estimate on and it's not only that simple. It's that simple once you know your equipment.

Also when it comes to plant size and cost effectiveness would you have the same light intensity or full capacity for a short plant or a tall plant . My assumption is high powered lights are probably designed to have an excess to penetrate tall plants . No point using 480watt £50 a month when you probably only need 200 watt
 
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