Light Intensity; LED vs HID

[BM9AGS]

COB LED - Defying Inverse Square Law since 2016

Above is reference. As stated inverse square law does not apply with reflectors, lenses and multiple light sources.

This came from a scientist. As I asked one because I thought all the guys that said I was wrong were fucking idiots. Haha

 

[ttystikk]

COB LED - Defying Inverse Square Law since 2016

Lol

 

[ttystikk]

Above is reference. As stated inverse square law does not apply with reflectors, lenses and multiple light sources.

This came from a scientist. As I asked one because I thought all the guys that said I was wrong were fucking idiots. Haha

YES IT DOES. It's applied differently in those instances but yes it still applies.

 

[BM9AGS]

Sure it does; it just applies to all of them working together.

Well yeah but the spacing of each cob plays a huge factor and reflectors and lenses make it too hard for any of us to accurately calculate on paper.

 

[disratory]

Have you tested or checked out a kessil h380 as far as LEDs go?
http://www.kessil.com/horticulture/H380.php

 

[BM9AGS]

Have you tested or checked out a kessil h380 as far as LEDs go?
http://www.kessil.com/horticulture/H380.php

Ohh get that shit out of My thread.

Fucking kessil. Who is this guy!?!

(I'm almost mostly kidding)

That light would be cool for helping me park my car in the garage in the dark!

 

[disratory]

That light would be cool for helping me park my car in the garage in the dark!

You don't have headlights?

What is wrong with that light? Seems like you have experience and knowledge in this area, thats why I ask.

 

[BM9AGS]

You don't have headlights?

What is wrong with that light? Seems like you have experience and knowledge in this area, thats why I ask.

My back up lights kind of suck after being white light blinded from headlight splash on garage across from mine.

Anyway. I have no knowledge or experience with kessel. How ever I will say that if that light was worth a shit they would brag about the par output and LEDs they use yet they don't so I'd bet my paycheck that it's just another burple BS ploy.....which it reads as such

 

[ttystikk]

Well yeah but the spacing of each cob plays a huge factor and reflectors and lenses make it too hard for any of us to accurately calculate on paper.

..which is what computers and light distribution graphs are for.

 

[disratory]

My back up lights kind of suck after being white light blinded from headlight splash on garage across from mine.

Anyway. I have no knowledge or experience with kessel. How ever I will say that if that light was worth a shit they would brag about the par output and LEDs they use yet they don't so I'd bet my paycheck that it's just another burple BS ploy.....which it reads as such

I was put on to them from my experience using their lights to grow coral. I dont think their horticulture lights are as well known as it seems the LED scene on this side of things seems still fairly new. I know that the lights two modes follow the required spectrum really well and also include UVa.

unfortunately this is the only decent review of these lights I can find. Maybe the info would make more sense to you as when they start talking about specific measurements I tend to get lost.
http://growershouse.com/blog/kessil-h380-led-grow-light-review-and-test/

 

[BM9AGS]

..which is what computers and light distribution graphs are for.

Yeah...... But add on lenses and I've not seen any calculations for that other than actual par readings from meters

 

[ttystikk]

Yeah...... But add on lenses and I've not seen any calculations for that other than actual par readings from meters

The computer programs will account for lenses, reflectors, wall reflectivity, etc, etc. Good stuff!

 

[BM9AGS]

I was put on to them from my experience using their lights to grow coral. I dont think their horticulture lights are as well known as it seems the LED scene on this side of things seems still fairly new. I know that the lights two modes follow the required spectrum really well and also include UVa.

unfortunately this is the only decent review of these lights I can find. Maybe the info would make more sense to you as when they start talking about specific measurements I tend to get lost.
http://growershouse.com/blog/kessil-h380-led-grow-light-review-and-test/

Compare 90wkessle to 50w cxb3590



To me it looks like they would be fine at 14" spaced every 6" apart. But I sure that would cost a stupid amount of money

 

[Abiqua]

YES IT DOES. It's applied differently in those instances but yes it still applies.

which is effectively not the same...same concept, different calculation

 

[ttystikk]

which is effectively not the same...same concept, different calculation

I'm just refuting the idea that it simply no longer applies. Of course the calcs are different.

 

[hillbill]

A good even canopy would seek to block as much light from getting through as possible for maximum photon torpedo absorption. Especially with a trained canopy, I want it absorbing as much energy as possible. All I am concerned with is intense absorption in about a 10" vertical layer.

I'm not sure penetration exists in the sense of an arrow passing through a target but rather how far the bow can cast an arrow across a field maybe.

Get as much green in front of the brightest light.

 

[disratory]

Compare 90wkessle to 50w cxb3590
To me it looks like they would be fine at 14" spaced every 6" apart. But I sure that would cost a stupid amount of money

Well ive got three of them right now to test and popped the seeds a little over a week ago :-/ guess ill find out

 

[Abiqua]

A good even canopy would seek to block as much light from getting through as possible for maximum photon torpedo absorption. Especially with a trained canopy, I want it absorbing as much energy as possible. All I am concerned with is intense absorption in about a 10" vertical layer.

I'm not sure penetration exists in the sense of an arrow passing through a target but rather how far the bow can cast an arrow across a field maybe.

Get as much green in front of the brightest light.

Saturation is penetration, basically.

 

[BM9AGS]

Well ive got three of them right now to test and popped the seeds a little over a week ago :-/ guess ill find out

Make sure that super intense center beam is a good distance from seedlings. I'd put them above 24" maybe 30" until they take off

 

[disratory]

36" seemed to do it.. its nice having no heat coming off of the lights heh