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Kevin Espiritu

๐Ÿ‘ค Speaker
616 total appearances

Appearances Over Time

Podcast Appearances

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

They'll use red light to signal flowering and stuff like that.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

So whoever was designing the lights back then was like, well, let's just give them exactly these ranges.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

like 450 nanometers or you know 660 nanometers whatever it is um and then these days lights that are coming out led or otherwise are trying to express like put out more of that spectrum because it's been proven like you said neil like they're using light in the far red spectrum they're using they're even using green light which we didn't know for like a century because you know you always hear like well plants are green because they reflect green and it's not entirely true

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

Not all plants are rejecting all green.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

So if you take red and blue, just colloquially, those ranges, I think the plant is using somewhere between like 91% and 95%, depending on which color it is.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

Green, you would think like, well, it's reflecting green, so it's using like 0% or maybe 10%.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

It's still absorbing in the range of like 70% to 80% of green light.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

Pretty much.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

Play him a little music, man.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

You know, I get it all the time.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

Like, do you talk to them?

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

Do you name them?

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

I don't.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

I'm a little bit brutal to them sometimes.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

Yeah.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

I mean, that whole leaves, like normal plant leaves, are absorbing maybe about 80% of green light or so.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

So they're reflecting back a 20, which is pretty much what we're seeing.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

But the way it ended up working in the study that kind of turned everyone on their head, realizing that we actually do use green light with plants,

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

is that it's penetrating deeper into the canopy.

StarTalk Radio
Homesteading on the Moon with Kevin Espiritu

So like the red and the blue light is getting used up first, absorbed at a really high efficiency.