ok a few things to clear up, no such thing as a 175 watt HQI, only 80watt, 150 watt and 250 watt. thats it for HQI.
a pulse start ballast will run any bulb, it is a probe start ballast that will not light a pulse start bulb. think of ballast in two groups
unaversal bulb group includes (HQi, Electronic and Pulse ballasts)
and
specific bulb, ie. Probe start ballast can only start a probe start bulb.
the only thing a pulse start ballast does to a probe start bulb is extend the life ot the bulb.
Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*
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