See http://en.wikipedia.org/wiki/Photosynthetically_active_radiation and click the "[who?]" in "Horticulturists[who?] say that blue light is the most important for leaf growth and that red light encourages flowering."

Speaking of urban legends, there were several movies with "Urban Legend" in the title. I was unfamiliar with most of the depicted urban legends, and, the urban legend that I remember best (from when I was around 14 years old) was never depicted in movies. It involved a boy giving his girlfriend Spanish fly and, when he left her in his parked car, she pleasured herself so much on the stick-shift that she died. What? You believe that really happened?