Such results evidenced the need for reconsidering the generalized use of white fluorescent lamps in tissue culture growth-rooms; because, besides the high explant multiplication rates and adequate bud lengths for the rooting phase obtained under LEDs, these light sources showed also the particular advantage of long average useful life (up to 100,000hours), compared to fl uorescent lamps (8,000hours) (YEH & CHUNG, 2009).