a certain wavelength will not cause hermaphrodite, no. interupting the dark cycle, if photoperiod, can cause hermies... "rodelization" i believe it is called... it was the method of creating fem seeds, not jsut for marijuana, before we used better options like silve thiosulfate. which is far more effective and consistent. can you cause severe damage which then causes a nanner o two? pobably... but those lone nannes don't poduce much pollen compared to a pollen sac with a full set of parts for pollen poduction.. i.e. not just the anther (nanner). Definiteyl won't become completely male in this case and only the need to survive causing some nanners in damaged areas.