Would it be safe to use, say, a 250 watt bulb in a fixture thats rated at 400 watts? I have a switchable 'fixture' (ballast?) that can be 250w MH or 400w HPS. Im considering using a 250w Bulb in HPS mode but I dont want to die! Also I know that you arent supposed to touch the bulbs when you change your headlights in your car cuz of the oil on your hands. Does the same hold true for a HID system? My finger gently grazed the bulb earlier during an adjustment and it got me thinking! Hahahha wtf am I saying!