Here we have the light. It is a switchable ballast (it has 250, 275, 400, and 440 watt settings for HPS, and 175, 192.5, 250, and 275 watt settings for MH bulbs) I use a 400 watt High Pressure Sodium bulb, but its dimmed by the ballast to 275. The plants are growing so aggressively and are so...