Thanks. That was informative. In many light systems the bulb limits current, but it seems the current is limited by the ballast in MH systems then.
Thats too bad. I was hopeing it was like florescent where you could use the higher wattage balast with the lower wattage bulb and be ready for...
What goes up as a metal halide bulbs wattage goes up? Say between a 175 and a 250W bulb. The amperage drawn by the bulb, the voltage supplied to it by the ballast, or both?
I mean the parameters at the bulb not at the current source for the ballast.
If there is a standard voltage at the bulb...
