HPS grow bulb, grow lamp, HPS lamp 50W / 70W / 150W / 250W / 400W / 600W / 1000W HPS grow bulb, grow lamp, HPS lamp 50W / 70W / 150W / 250W / 400W / 600W / 1000W For Commercial ... the ceramic arc tube produce a yellow/orange light with extremely high LPW performance and exceptionally ... sunlight or metal halide lighting). This type of light promotes flowering, budding, and fruiting in plants. ...