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Old 02-18-2016, 12:27 AM #17
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Default Re: Growing plants with lasers

Some peppers might require warmer temperatures to thrive in general. It depends on the exact cultivar though, so experimenting with fairly random seeds will yield fairly random results.

70 fahrenheit should be enough for most though, as long as it doesn't get colder than that at night. Most peppers will grow in non tropical areas during summer, they do pretty well in western europe even outside, but the growing season is rather short so your timing has to be pretty good to get a decent yield. The most common thing to do is to sprout them indoors in early spring, and transfer them outdoors somewhere in may when there is little or no chance of freezing weather at night.


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Old 02-22-2016, 01:56 AM #18
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Default Re: Growing plants with lasers

Many cheap grow lights are built using 635nm LEDs, instead of the more expensive 660nm LEDs, that are meant for lighting, but aren't so suited for chlorophyll (A) absorption. The ~655nm red lasers might do a good job though. If you were doing a growing operation, the power costs might justify the initial cost of using lasers for greater efficiency, assuming they last as long and you're very patient.
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Old 02-23-2016, 12:05 AM #19
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Default Re: Growing plants with lasers

I'm not really sure that 650-660 nm leds would be more expensive (to produce), but they are less commonly available nowadays.

The difference is not that significant though: Plants will capture a 660 or 635 nm photon well, but the latter has a few percent more energy that is not used by the plant. This is a loss, but equates to the voltage difference between a 660 and 635 nm led given equal quantum efficiency.

And when looking at that aspect, red laser diodes are pretty good compared to red led's. They usually produce many more photons per mA compared to led's, and the wavelength is on the 650 nm sweetspot as well.

With current technology a combination of red lasers with blue leds might be the best performing system overall.
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Old 02-23-2016, 11:17 PM #20
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Default Re: Growing plants with lasers

hmm i was thinking it must be possible to grow planets using a laser like 2 days ago hehehe
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