[HH] Food hacking

[Stephen Ronan]

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-urban-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.