Some seeds need light to germinate, others need darkness. Which color spectrum they need may vary from species to species. I use near red light to germinate my tomato seeds. Maybe y'all would like to hear what a scientist who has done research for NASA says on the subject of light spectrum and plant growth. I cannot post a link, so search youtube for Dr. Bruce Bugbee's video, Toward an Optimal Spectral Quality for Plant Growth and Development.
