Sonlight MH 400W is a 400-watt metal halide grow bulb designed for the vegetative phase. The MH-HSX Hyper Grow model operates at 230 V with an E40 mogul base and delivers a 4500 K white spectrum suited to branching and leaf development. Retail specifications list approximately 39,000 lumens and a typical lifetime around 20,000 hours. Recommended use is in a 100 x 100 cm grow area, with a minimum 40 cm distance from canopy. The tempered glass outer bulb houses a quartz arc tube, and the bulb measures about 28 x 4.7 cm. Sonlight highlights SLP (Son Light Power) design aimed at reliable ignition and reduced early failures, and compatibility with magnetic or electronic HID ballasts.
