THE SYLVANIA 250 WATT METAL HALIDE LAMP HAS A BLUE SPECTRUM WHICH IS I-DEAL FOR VEGETATIVE GROWTH.
SOME GROWERS USING METAL HALIDE'S FIND THAT THE LEAVES ARE LUSH GREEN WHEN USING THIS TYPE OF LAMP. IN FLOWERING, THE GROWERS CHANGE THE LAMP FOR A SODIUM WHICH HAS THE ORANGE/RED SPECTRUM WHICH IS I-DEAL FOR THE BLOOMING PERIOD.
