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Yup, that 10% is a bogus reading.

If I were to only select one color bulb for the entire grow, it would be around 3000K. The reason is that the plant is usually in flower much longer than veg. And the redder light of a 3000K source (~630nm and ~660nm) encourages flowering and budding.

Congrats! Looks good from what I can see. Keep the heat under 80*F and the humidity around 50 and you should be good. How many plants? How much space are you working with? Details on your LED...

The more you top a plant, the shorter it will be after the stretch. Maybe top that one on the right, wait a few days and flip it. Keep LST-ing for a week into flower to keep them low.

One or two slight overwaterings won't cause too much damage. But continued overwatering will be very detrimental to the plant and could very will kill it. If this is a common occurrence, I would check the roots if possible... or at least give them a whiff. If they smell like decomp you have a...

Yeah, it's in the music section.

I second that.

Light doesn't hurt roots. Dryness and heat does. That said, coco mats kick ass.

If you are asking if fewer, more powerful light sources are better than many less powerful light sources you will get quite a few different answers. It all depends on your preference and grow style. Here's my take. Many, less powerful light sources (think LED), are great for an even...

You can use 3100K all the way through. You can use 6500K all the way through. But light with more blue is more beneficial in veg and light with more red is more beneficial in flower, to put it very simply.

Over watering will induce stress at the least. If it's bad enough then your roots could be mush. Wait till it dries. You can turn on some fans, add some drain holes, raise the temp or turn on a dehumidifier to help dry it out faster. But don't water again until it's dry.

Shouldn't there be a tutorial attached to your post? I mean, this is the DIY section and all...

^ That's how I do it. I put them in dirt as soon as I see a tap root.

Yes.

It causes stress. How much depends on many factors.

Kind of preference. I like when the majority of the trichomes are cloudy with some amber. www.rollitup.org/t/trichomes-harvesting.516184/

It's GENERALLY recommended to use 50W of LED per sqft. You have about 6.5 square feet.

Basically an Arduino is an "easy to use" (depending on skill level) micro-controller that you can make do practically anything with some simple programming and electronic skills. I purchase sensors and program my Arduino to react to the environment/time. It controls the water pumps, fans...

I'm using an Arduino as well as a raspberry pi. I'm currently monitoring CO2 levels, heat and humidity (in grow room, mom room and outside), soil moisture (for mother plant), checking for smoke and water leaks, and can watch all device statuses and can view it all in near-real time via a web...

some light reading: http://mb-soft.com/solar/saving.html