Line a large box or plastic storage container with sheets of aluminum foil. Use a few beads of craft glue along the inside of the box to hold the foil in place. The foil will reflect more of the light around the plants than a box without foil.
Place a shallow tray in the bottom of the box to hold drainage water. This makes it easier to water the plants and keeps the bottom of the grow box clean.
Set your soil-free filled plant pots onto the tray, while leaving enough space between the plants for good air circulation.
Attach two rows of high-intensity white LED light strips to the bottom of the cover of the grow box. Some strips come with pre-attached adhesive while others require a few screws to keep them in place. Drill a hole through the side edge of the cover with a drill. To keep the hole small, drill the hole as large as the width of the cord and slice from the hole to the edge of the cover. Pry open the slit with a utility knife to slide your plug through.
Place the cover over the organic grow box. Plug in the LED lights to test. Remove the cover. Plant your seeds, add water and nutrients as needed per plant. Replace the cover on the box, turn on the LED lights and wait for the plants to sprout.