Build Your Own DIY Grow Lights.

Sure, you could go to the fancy indoor garden/hydroponics store and buy speciality grow lights that mimic the color spectrum of the sun’s rays. Or you can make these LED spikes from Popular Science…. Goodness, even the name sounds cooler. “These bulbs actually work best as a supplement to sunlight during the
day; however, they’ll also provide enough light after dark to ensure
that your plants get the 12 to 18 hours a day they need to thrive. We
connected three inside a clear plastic tube, a “light spike” that you
can stick right into the pot for direct exposure, and added a
controller that adjusts the brightness.”

No soldering or other electronics knowledge needed. Via.