The Ever-Present Glow of LED Greenhouses

Re:The Ever-Present Glow of LED Greenhouses by e12e on Wednesday October 23, 2019 @06:53AM (#21333272)

Isn't sunlight much more powerful in terms of energy than these lights? Couldn't we use a "one-way" mirror to reflect the led/lights inside, and still allow sunlight in during the day? The additional reflections inside the greenhouse might more than make up for the "shade" provided by the "one-way" mirror?

(now, AFAIK there are no actual one-way mirrors, simply semi transparent (both directions) - question is if we cut 70-80% of the leds escaping, would 20-30% sunlight entering be enough?)

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Re:The Ever-Present Glow of LED Greenhouses by the8472 on Wednesday October 23, 2019 @09:21AM (#21334324)

LEDs are supplemental. Sunlight gives you about 1kW/m² for free, it's hard to beat that. So anything that sacrifices a large fraction of sunlight is probably a non-starter, especially during the colder seasons where you also need it to keep the glasshouse warm.

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Re:The Ever-Present Glow of LED Greenhouses by e12e on Wednesday October 23, 2019 @12:29PM (#21336248)

I suppose you could always go for semi-transparent - so not reflect but absorb a fraction of the light?

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