Then get a philips allstart 330 cmh. Keep the cheap hps bulb as back up. The cmh pulls 330w plus 5 -10 watts extra from ballast too. The cmh runs cooler than a 250w hps and has higher par (umole/s) than a 600 watt hps.
You can swap the reflector for a vertical mogul . Grow taller plants vert style get larger yield..