[HH] Food hacking

[Greg London]

I wasnt concerned about the efficiency of LEDS as I was concerned about
the efficiency of solar panels. Otherwise, do we want to grow crops by
burning coal? That seems problematic long term. Especially if one year of
food grown entirely from coal fired leds would probably burn all the coal
on the planet, and then kill us via global warming.

Sure, coal electricity is cheap. But its literally killing us.




On Sun, April 2, 2017 11:10 am, Stephen Ronan wrote:
> Oops, typo... should be:  "Luminous efficacy (lumen per watt) of white
> LED tips was 75 in
> 2010, is 150 in 2016, and will reach around 200 in 2020 (Fig 1.1). "
>
>
> On Sun, Apr 2, 2017 at 11:04 AM, Stephen Ronan <sronan at gmail.com> wrote:
>
>> Interesting. I suppose the need for paths between rows of many crops
>> for tractor tires and/or farm workers reduces density for many crops on
>> farms relative to something like these shipping container farms based in
>> South Boston: https://www.freightfarms.com/
>> I found the short videos there worth watching. One claims as much
>> lettuce can be grown in a shipping container as on two acres of land...
>>
>> Apparently, the relatively low heat transfer from LED lights also
>> facilitates denser crops
>> http://www.urbanvine.co/june_16/why-purple-led-lighting-is-ideal-for-ur
>> ban-farming
>>
>> In a preview snippet from this book "LED Lighting for Urban
>> Agriculture"
>> http://www.springer.com/us/book/9789811018466
>> I see: "Luminous efficacy (lumen per watt) of white LED tips was 75 in
>> 2010 is 50 in 2016 and will reach around 200 in 2020 (Fig 1.1). "
>>
>>
>> On Sun, Apr 2, 2017 at 1:29 AM, Greg London <email at greglondon.com>
>> wrote:
>>
>>>> LED light is so cheap we might be growing everything inside soon.
>>>> 24 hours a day.
>>>>
>>>
>>> I'm not a grid expert, but I don't think the numbers add up for that.
>>>
>


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