Philips MH 400W HPI – T E40 lamp Request Quote Category: Lighting Tags: light, metal halide, mh lamp, philips MH (metal halide) lights are generally used in the vegetative stage of growth (when plants are young and growing just stems and leaves). Related products PHOTOBIO Advanced Quantum PAR MeterRead MoreRequest Quote Nobel Commercial HID & LED Light ControllerRead MoreRequest Quote Philips HPS 400W SON-T E40 lampRead MoreRequest Quote