3 ms·
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 sun
by e12e 7y ago
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?)
- the8472 7y agoLEDs 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.
- e12e 7y agoI suppose you could always go for semi-transparent - so not reflect but absorb a fraction of the light?