Does a 50 watt metal halide bulb require a ballast?

rastafarmer

Member
I'm a rookie at growing, so forgive me if this is a dumb question. My one & only seedling is a mere two weeks old and i'm trying to get everything prepared from now for the veg stage. I plan on using a 39w/50w metal halide bulb , will i need to use a ballast?
 
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