High Efficiency LED for Joule Thief, etc.

[MarkE]

Tinsel
A sizzling Topic ATM ...
Think PINK

https://www.youtube.com/watch?v=ILzWmw53Wwo

http://www.terraspheresystems.com/index.php/news-media/19-news/41-urban-farming-20-no-soil-no-sun
From Above link  I square ft of Vertical farming WILL YIELD 64 head of lettuce per arum, where as 1 square foot of Land farming
?? MAY ??   yield 3 heads per anum.[Ideal conditions]

Establishing Crop yields per square foot against energy required to run the LED's would be wonderful to know ,do they have to run at full power ?
I do understand that PWM would NOT be acceptable for growing crops ,you can trick the eye But not mother nature [thx Brad].
Or would PWM be appropriate for part of the plants 24/7 365 artificial day ??

This is the future.....

Chet K

The reduction in water consumption and transportation requirements are really the big factors.  You can get a feel for the amount of LED power needed by the density of the lighting in the video.

[ramset]

Typical comments from Big business attempts / failures  in this area have MUCH more to do with Power needs.

it would be much better to Not "feel" the needs and to actually have a grasp on what they are.

[MarkE]

Typical comments from Big business attempts / failures  in this area have MUCH more to do with Power needs.

it would be much better to Not "feel" the needs and to actually have a grasp on what they are.

Is that too much or too little coffee talking this morning? 

Water requirements translate to energy needs.  Transportation translates to energy needs.  The fruit and vegetable basket for the USA is in a severe drought right now.  Dropping water needs for vegetables by 90% means dropping a lot of the energy requirements.  20% of California's electricity is used moving water through the state.  80% of that water goes to agriculture.  While it would be nice to know the specific power in the lighting the video suggests that it is not that great.

[ramset]

Probably need a bit more Coffee 

  However...
  for clarity Mark E ,
You want me to get a feel for the input power by looking at the light ?

Did I just read that what Forum am I at ?

it says 3 watts on the box !!
------------

Having done some investigations already , the true costs to the facility are more my Concern ATM , not so much transportation infrastructure and similar costs. Water  as outlined in the Link can be diminished to 5% or less of open field farming [so it is not a real cost to the growing facility ]

  As I have already stated the reasons given for "failure" of big business in  these big indoor growing ventures have been underestimating the energy costs to grow healthy crops , NOT trucking and water costs !


I had read from one blogger in China a reference to 30 KW for their PINK LED farm,  however he did not give more specifics except to say that he and his ":partners" in China had increased food export from their indoor Vertical Farm by 1000% in the last four years.
any info which can be provided here would be greatly appreciated.[these things are rapidly becoming trade secrets in some venues]

respectfully
Chet K

[MarkE]

Probably need a bit more Coffee 

  However...
  for clarity Mark E ,
You want me to get a feel for the input power by looking at the light ?

Did I just read that what Forum am I at ?

it says 3 watts on the box !!
------------

Having done some investigations already , the true costs to the facility are more my Concern ATM , not so much transportation infrastructure and similar costs. Water  as outlined in the Link can be diminished to 5% or less of open field farming [so it is not a real cost to the growing facility ]

  As I have already stated the reasons given for "failure" of big business in  these big indoor growing ventures have been underestimating the energy costs to grow healthy crops , NOT trucking and water costs !


I had read from one blogger in China a reference to 30 KW for their PINK LED farm,  however he did not give more specifics except to say that he and his ":partners" in China had increased food export from their indoor Vertical Farm by 1000% in the last four years.
any info which can be provided here would be greatly appreciated.[these things are rapidly becoming trade secrets in some venues]

respectfully
Chet K

If you want hard numbers you will have to dig.  Begin with PPFD.