We have started some green onions seeds indoors. Ideally we can have a spot for a seed rack, with a fluorescent light mounted on each rack. However, living in a small house we don’t have that luxury. So I find a spot in the basement where I can put 3 seed trays underneath a kitchen cabinet. I installed a fluorescent fixture that uses 2 T12 tube. One cool white and one soft white. It would be better if you can use T8 tubes because the light is more equally distributed.
I use 2 boxes to hold a piece of board which in turn holds the 3 seed trays. Once the seeds sprouted, the light will be turned on for 12 hours a day. It is exciting to see how this will turn out.