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Metal Halides & large ballasts

"Doesn't sound right.  MH's require a BIG heavy ballast.  Could it have been
a quartz hallogen bulb?"

Karen Randall
Aquatic Gardeners Association

I have been using a 150 Watt Mercury Vapour bulb that uses a wacking great
ballast. Would it be possible to find a halide bulb in the range 150-175
Watt that would work as a replacement ?

Anyone done this ? especially anyone outside US where Mercury Vapour is more

Andy Moore  -  andy at ascot_u-net.com

Treasurer/BBb Tuba Player Poulton-le-Fylde Brass Band
and Aquatic Plant/Discus collector