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 Philips HPS 400W SON-T E40 lampRead MoreRequest Quote Cool White G13 18W Opal 4ft T8 LED TubeRead MoreRequest Quote Nobel Commercial HID & LED Light ControllerRead MoreRequest Quote