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Thank you to Chris Madsen @ Apogee Instruments for sending us an actual Quantum PAR meter.  This will let students design better lighting arrays with increased efficiency!   We mailed it to our latest outpost, in Alaska, where power costs US$ 0.50.kWh.   

Mars Hydro sent us a Mars Reflector 240W .  99 watt draw from the wall, and lots of individual LED with an output of 650 to 66- nanometers.  This is important.  Why?  Our Apogee Original Quantum PAR meter measures photons in the range of 410 to 655 nanometers.  This means that our cool new meter doesn't measure the photons our cool new light produces!

We knew this.  Apogee upgraded a few years ago to a sensor that measures longer (up to 700 nanometers) wavelength light.  

The point of the Watney Module is to grow food with whatever lights and soil you can scrounge up.  Duct tape and aluminum foil make cheap reflectors.  


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Watney module in classroom
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Watney: 100 watt 2700K LED & 100 watt 5000K LED
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Notice that string of lights hanging down. "Dime Store| LED bulbs for $1/each
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Donated by Apogee Instruments, our PAR meter is currently in Alaska!
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Cheap LED flood lights work!
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18 day old radish
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Don't need no cash donations!
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Watney: Kale under 4 - 13 watt Phillips PAR38 LED (all 5000K)
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Baby kale! Baby kale! Do do do doo do
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MAKER: 3 - 39 watt "plant spectrum whatever that means" LED COB 120 VAC
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