New light or????

Randomblame

Well-Known Member
It seems none of you understand how the sun works, LOL!
She's 92,960,000miles away, do you really think the one foot more or less makes a difference?

Incidentally, sunlight is mostly diffuse, even in the brightest skies, the diffusity is ~5%. Atmosphere, dust, clouds, water, reflections, ... all this makes sunlight more or less diffuse.
Why do you think the sky is blue?
Because light is reflected by the ocean(waves acts like millions of mirrors) and than it's again reflected by the outer atmosphere and bouce back on the earth. Do you still believe sun rays are hitting plants only in one direction?

The reason why a 1m high hanging lamp has better penetration like a 0.5m high hanging is the light is more diffuse. With increasing distance you get more and more reflections, which makes the light more diffuse, thus it can penetrate deeper. It has nothing to do with ISL or the sun or omnidirectional or directional, when we talk about better penetration everything is about diffusivity.

@GrowLightResearch
However, I do not see that you really need to hang a strip-based lamp higher.
The hundreds of diodes from a strip based lamp provide for a diffusivity that a point light source can not offer. So I think that a 12" high hanging strip based lamp has better penetration like a 1000w lamp, no matter how high it hangs.

Simple setup (without measuring equipment): hang a COB over one big plant and see from the side how much shadows you can see (take a picture), then hang a strip over the same plant and compare how much shadows are still visible.
You can clearly see a difference using only your naked eye.
 
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Olive Drab Green

Well-Known Member
This is SR-71 PK x Sour Diesel and Sour Diesel 2 weeks, 5-6 days from seed. Roots Organics medium and nutrients. COBs are about 18-20” above.

A02E0334-A312-4A11-8BF2-CE8A3AFBA9FD.jpeg

SR-71 PK x Sour Diesel 4C07924E-6F1F-4B8C-ADDD-9310E2E725C4.jpeg DB4712BE-2DEC-420A-A7CB-5D6CB04CBB46.jpeg 1D1CC76A-3137-4E47-9A29-5CA4CEC1513E.jpeg

Sour Diesel (and peyote cactus)
50581F03-31E7-4991-87D4-7D9C0DCA31AB.jpeg CB4E37B7-06E0-422B-BE59-EE5B6572F458.jpeg 4C893797-BF12-47B2-AE7C-34CA300AB60B.jpeg 9D97ECAB-1918-4565-87ED-ED8D985620B3.jpeg
 

Randomblame

Well-Known Member
I think one of the admins should make in this thread and remove all your cocksucker posts.
Sure, only 2 or 3 useful pages being left ...
While it's amusing, for a certain time, from people with an IQ of over 120, I expect something different. You both behave like the last proletarians! Really like ghetto kids..
One should tell your mothers to read all your filthy remarks. Shame on you both! Off to the corner ...
 

Olive Drab Green

Well-Known Member
I think one of the admins should make in this thread and remove all your cocksucker posts.
Sure, only 2 or 3 useful pages being left ...
While it's amusing, for a certain time, from people with an IQ of over 120, I expect something different. You both behave like the last proletarians! Really like ghetto kids..
One should tell your mothers to read all your filthy remarks. Shame on you both! Off to the corner ...
I can’t give you anything different when I’m being pointlessly harassed. Of course I’m not going to have anything serious to say when I cannot take you seriously, That said, I’m not here to entertain you. Go fuck yourself. :eyesmoke:
 

mahiluana

Well-Known Member
Do you think I could do the same
i can build a 1650W led lamp and touch the leds with my tongue...

but what do you expect with a wired cxb3590 @ max. current inside your fist - how many seconds can you hold ??? how many minutes to destroy the chip ?

so heat management specially of leds is a main issue / as most chips die @ 150°C
 

Fubard

Well-Known Member
Yet you would need what size of HID to replace the cob?

You build a 1kW led, what level of HID would be the equivalent?

And, in either case, are you saying that the equivalent HID would put out EXACTLY the same heat as either LED scenario above?
 

Fubard

Well-Known Member
you are invited ! ...dinner is served at 19:30

HID = ~80% heat efficient
LED= ~75% " " inside a range of good and bad types of bulbs and chips.
Would love to, but it's rugby time and I think it would be a bloody expensive taxi.


Oh, what size of hid is the equivalent of a 50w cob? Saying that puts out EXACTLY the same heat as the cob?
 

mahiluana

Well-Known Member
are you saying that the equivalent HID would put out EXACTLY the same heat as either LED scenario
no i said: it´s possible to substitute a 1000w HID with 600w of LED --- and then you are able to decrease the heat amount in your grow room significantly // 800w ---> 450w of heat
 

Fubard

Well-Known Member
Therefore, the led runs cooler as you need a lower wattage for the same equivalent light levels produced by HID.

As said, it's conservation of energy, not thermodynamics. A led produces more light for a given amount of energy, and that means that something else has to be reduced to compensate for that as you cannot have something producing more energy than it consumes. In this case, heat energy is reduced.
 
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