First time grow 4 x 8 lighting suggestions

[jarvild]

Then you've got to reflect it back and get more losses/heat etc bare bulb vert obviously captures it all well. I think the key is having the perfect coverage, intensity and distance from canopy to minimise all loses and maximise what a plant can take.

Has anyone ever grown bare bulb vertical ? 360 degree of light.

 

[AmericanGrower508]

If it was me I would grab 2 of these.
https://www.ebay.com/itm/CMH-630W-DE-COMPLETE-KIT-W-BULB/332570798968?hash=item4d6ec3ab78:g:KaIAAOSweutalu9P

with proper air and exhaust your tent will rock.

 

[nfhiggs]

40 strips and 4 drivers

There's your first mistake. It only takes 24 of the single row 44" Samsung F-strips at 40 watts each (20% below test current) to hit 950 watts - Double row strips will do it with an even dozen. 25 piece price at Digikey is $522 for the single row - double row strips saves you $22. Add another $230 for the drivers. The .601 profile sinks from Heatsink USA can be added for another $88 for single row strips. The 1.00 profile for double row strips adds the same amount.

You can also run the Q strips at 900 mA and use the same amount of strips (24) for about $100 less and get the same amount of light and the same overall efficiency.

 

[Slinging PAR]

600 watts of LED make the same heat as 600 watts of HID, HPS etc., but LED makes around a third more light for the same watts and heat.
LED has less radiant heat so it's recommended to run air temps in the low 80's rather than 75 or so. BTW, strips are great for side lighting, I have one hanging by the wires in each corner.

Is that the special kind of Physics?

This thread just went all stupid like.

 

[nfhiggs]

Is that the special kind of Physics?

No, its called first law of thermodynamics - also known as the conservation of energy. HID may make more direct heat, but physics (the REAL physics) tells us that all that light being created *in an enclosed space* becomes heat as well. The only light that does not get converted to heat, is the light absorbed by the plant which is converted to carbohydrates (stored energy) - and that's a pitifully small percentage of the whole.

 

[Slinging PAR]

No, its called first law of thermodynamics - also known as the conservation of energy. HID may make more direct heat, but physics (the REAL physics) tells us that all that light being created *in an enclosed space* becomes heat as well. The only light that does not get converted to heat, is the light absorbed by the plant which is converted to carbohydrates (stored energy) - and that's a pitifully small percentage of the whole.

All light becomes heat does it?

Interesting theory but technically correct if you look at the big picture and take into account the plant material being used as a fuel at some point. Then you got evaporation, sublimation.... a whole bunch of other processes that use light as an energy source. Conservation of energy does not mean that all energy is converted to heat; it can do work i.e. generate a force to move an object.

Since it is a silly debate that has been waged on this forum forever to no avail, I say you can believe the world is flat all you want if that floats your boat. At the end of the day everyone wants to grow the best plants possible and will take their own journey learning along the way.

 

[csovfnst]

If it was me I would grab 2 of these.
https://www.ebay.com/itm/CMH-630W-DE-COMPLETE-KIT-W-BULB/332570798968?hash=item4d6ec3ab78:g:KaIAAOSweutalu9P

with proper air and exhaust your tent will rock.

Seems like these lack a lot in the blue spectrum based on the spectrum chart.

 

[jarvild]

There's your first mistake. It only takes 24 of the single row 44" Samsung F-strips at 40 watts each (20% below test current) to hit 950 watts - Double row strips will do it with an even dozen. 25 piece price at Digikey is $522 for the single row - double row strips saves you $22. Add another $230 for the drivers. The .601 profile sinks from Heatsink USA can be added for another $88 for single row strips. The 1.00 profile for double row strips adds the same amount.

You can also run the Q strips at 900 mA and use the same amount of strips (24) for about $100 less and get the same amount of light and the same overall efficiency.

Thanks, but the 44" strips limit modularity

 

[nfhiggs]

Thanks, but the 44" strips limit modularity

22" strips are slightly more than 1/2 the price of the 44", so the cost difference is negligible.

 

[nfhiggs]

All light becomes heat does it?

Yes, it REALLY does - minus the SMALL fraction that drives photosynthesis and other plant processes. Try taking a physics course or two. In an enclosed environment, the electric energy of your lights is converted into two forms - direct heat, and electromagnetic radiation, most of which is in the visible light spectrum. When light falls on an object its either absorbed and immediately converted to heat, or its reflected/re-radiated. Light is not really able to be readily converted into other forms of energy other than heat. It can move electrons (photovoltaics), but there's not many solar cells in your enclosed grow environment is there? .

Then you got evaporation, sublimation.

Yeah... that's just light heating stuff up....

generate a force to move an object

And what objects bigger than electrons does light move?

 

[1212ham]

Since it is a silly debate that has been waged on this forum forever to no avail

Then why inject it into this thread? Maybe because you are AKA growlightresearch and nofuckstogive?

 

[Slinging PAR]

Then why inject it into this thread? Maybe because you are AKA growlightresearch and nofuckstogive?

Neither of those two but I know who you are referencing. But thanks for mentioning as I know now to put you on ignore and save myself from further wasting my time.

Regardless, if you don't want to educate yourself to resolve your ignorance then you can't expect those who are educated in those matters not to try and correct.

 

[Humple]

Here we go again.

 

[Slinging PAR]

Yeah... that's just light heating stuff up....


And what objects bigger than electrons does light move?

The only justified response to this is to suggest enrolling in a science program from an accredited university and acquiring degrees in the relevant areas.

Generally accepted as a positive social interaction in the real world, unfortunately sage advice on forums such as these is will be seen as an insult. As such I will put you on ignore and ask you to do the same for me as well.

 

[nfhiggs]

As such I will put you on ignore and ask you to do the same for me as well.

Yeah most people that can't handle their incorrect ideas being corrected tend to do that.

B'bye.

 

[csovfnst]

Does every forum thread about lighting end up in an argument that really doesn’t have anything to do with the OP ?