MH ballast

Just a regular ole M59 style? (Think 59 is for a 400w), magnetic? May want to call Locke supply in Plano.

Or order one online
 
i am only looking for 150W or 175W for my 30G frag/nano tank. what is the difference between magnetic and electric?
 
Magnetic Tar Ballasts run hotter (to the touch) and can hum somewhat, which may be a distraction.

Electronic Ballasts tend to run cooler and use less electricity.
 
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