Light Intensity; LED vs HID

cdgmoney250

cdgmoney250

Well-Known Member
Just referencing how light works, regardless of the source. I'm hopeful that if people actual read through those links, then we can put this "debate" about 'light intensity vs source' to rest. Because, in fact, there is nothing to "debate".

Not referencing light and plants at all. Just light.

And I completely agree about diffused light and reducing hot spots being beneficial for plants.
 
BM9AGS

BM9AGS

Well-Known Member
cdgmoney250 said:
This thread is painful to read.
How many times can we go around and around in circles saying the same shit?!?
You either get it or you don't.

Light is Light. If you don't understand that, I would suggest a wikipedia search.

Read through the following links. If you still have questions, then re-read through the following links.

https://en.wikipedia.org/wiki/Light

https://en.wikipedia.org/wiki/Electromagnetic_radiation

https://en.wikipedia.org/wiki/Optics
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Mind blown.
Light is light. I get it.
Time to throw away the cobs and grow with my headlamp.....its light so all the same.

Hehehe. I need beer
 
BM9AGS

BM9AGS

Well-Known Member
Look, if light was just light and didn't diminish in intensity for a given area or spread out if you will then why don't people grow with they're lights far far away from canopy?

1kw DE lights are a high power light from one source. LEDs can be the same but for our underdriven LEDs we must bring them close to canopy.

With out lenses and reflection to calculate all light diminishes in intensity as it travels away from source. Just as holding your hand to hid it can burn and it's less hot as you go away from source. It's all predictable from the inverse square law in this manner. Of course excluding any reflection or magnification.

If this info is wrong then I want to see someone that says it's wrong grow a plant with the light source from 20 feet away.
 
Atulip

Atulip

Well-Known Member
How about a frickin lazer?


We pick our height based on spread needed. Refer to my post on page one with a lovely graphic of beam angle. And again. Look at spectrum king, it's designed to be 4ft up with that 60° reflector. And it's just a bunch of low watt diodes crammed in a single highbay.

We like them spread out more and lower to match desired coverage. If I jumble my cobs together, I'd want them higher to spread more. If they're spread out on large fixtures, I can drop them lower.


Edit and here's the math for it. Angle beta for 1/2 beam angle, side a for height, side b for distance from center to half output.

http://www.mathportal.org/calculators/plane-geometry-calculators/right-triangle-calculator.php
 
BM9AGS

BM9AGS

Well-Known Member
Atulip said:
How about a frickin lazer?


We pick our height based on spread needed. Refer to my post on page one with a lovely graphic of beam angle. And again. Look at spectrum king, it's designed to be 4ft up with that 60° reflector. And it's just a bunch of low watt diodes crammed in a single highbay.

We like them spread out more and lower to match desired coverage. If I jumble my cobs together, I'd want them higher to spread more. If they're spread out on large fixtures, I can drop them lower.


Edit and here's the math for it. Angle beta for 1/2 beam angle, side a for height, side b for distance from center to half output.

http://www.mathportal.org/calculators/plane-geometry-calculators/right-triangle-calculator.php
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I won't read SK references because they're an abortion. However if light distance is simply based on foot print then throw up some reflective walls on the sides of your foot print and have the light 10 foot away. How will that turn out??

I mean anyone growing in a tent should just max the light to the top of the tent.
 
OneHitDone

OneHitDone

Well-Known Member
BM9AGS said:
I won't read SK references because they're an abortion. However if light distance is simply based on foot print then throw up some reflective walls on the sides of your foot print and have the light 10 foot away. How will that turn out??

I mean anyone growing in a tent should just max the light to the top of the tent.
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I know a lot of peeps here don't like Spectrum King and their front man or whatever. It's clear he is not the one designing the lights.
I have had several email convo's with him and it has been nothing but straight up, kind, and courteous. That is a lot more than can be said for most of the company's pimpin shit all over the net.
Honestly they are on the right approach if you really want to take hps out of the market. Design a fixture that can hang right in the same place an hps was with no need to relearn to grow and control the application of the lights like all these cob panels.
I was also told that they have a new low profile spread out design coming and some products for those of us who grow greens and other things besides herb.
 
P

PurpleBuz

Well-Known Member
BM9AGS said:
I won't read SK references because they're an abortion. However if light distance is simply based on foot print then throw up some reflective walls on the sides of your foot print and have the light 10 foot away. How will that turn out??

I mean anyone growing in a tent should just max the light to the top of the tent.
Click to expand...
reflecting light occurs a loss in light as there is no such thing as a perfect mirror.
 
P

PurpleBuz

Well-Known Member
OneHitDone said:
I know a lot of peeps here don't like Spectrum King and their front man or whatever. It's clear he is not the one designing the lights.
I have had several email convo's with him and it has been nothing but straight up, kind, and courteous. That is a lot more than can be said for most of the company's pimpin shit all over the net.
Honestly they are on the right approach if you really want to take hps out of the market. Design a fixture that can hang right in the same place an hps was with no need to relearn to grow and control the application of the lights like all these cob panels.
I was also told that they have a new low profile spread out design coming and some products for those of us who grow greens and other things besides herb.
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regardless, he may be a great guy, BUT one look at the website, the exaggerated claims and all I see is a car salesman. Their lights from what I can tell are actually decent lights probably better than the disposable Chinese led lights. If the price was right I'd probably use them over a mars.
But then again I been building better lights all by myself so why bother ?
 
JorgeGonzales

JorgeGonzales

Well-Known Member
PurpleBuz said:
regardless, he may be a great guy, BUT one look at the website, the exaggerated claims and all I see is a car salesman. Their lights from what I can tell are actually decent lights probably better than the disposable Chinese led lights. If the price was right I'd probably use them over a mars.
But then again I been building better lights all by myself so why bother ?
Click to expand...
So, Amare?
 
BM9AGS

BM9AGS

Well-Known Member
PurpleBuz said:
what ? a light mfg that refuses to publish any meaningfull specs?

Has anybody actually broken down an amare to estimate their efficiency?
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Yeah. I don't trust any light manufacture out side of our cob guys on this site.

Even in the DE world I think that well populated study on single ended gavita and the de reflector are subjective
 
cdgmoney250

cdgmoney250

Well-Known Member
BM9AGS said:
Mind blown.
Light is light. I get it.
Time to throw away the cobs and grow with my headlamp.....its light so all the same.

Hehehe. I need beer
Click to expand...
If you want 'light density' or irradiance that exceeds that of 1000w DE, then cram all those COB's as close as you can together. Grab your PAR/LUX meter and report back. Let us know how even the footprint is.
 
BM9AGS

BM9AGS

Well-Known Member
cdgmoney250 said:
If you want 'light density' or irradiance that exceeds that of 1000w DE, then cram all those COB's as close as you can together. Grab your PAR/LUX meter and report back. Let us know how even the footprint is.
Click to expand...
Ok deal. After you grow with your lights 10 feet away from canopy.
 
BM9AGS

BM9AGS

Well-Known Member
JorgeGonzales said:
With Stellas you may find it um...challenging to get an even light distribution without a higher ceiling than most have. Ironically, despite @Airwalker16 's enthusiasm for a glaring hotspot, it was @robincnn 's beautifully even 90 degree reflector tests that sold me on them.
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Yeah brother. I believe the hot spot will be spread enough at 20 inches above to accommodate......based on my calculated by-eye footprint on my calculated wall I believe this to be......good 'nuff
 
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