No i don't consider your questions hijacking. K-cups cups I wouldn't think would last you that long. I would think you would risk stunting their growth leaving them in that long, but that's just my thinking. I'm just as new to this as you are so I could be wrong. The lighting.....with the price of T5 bulbs and fixtures being not too bad in price I would personally get the correct system, but again that's just me.