http://www.expresslightbulbs.com/getgreen/metal-halide-ballasts/2009/02/02/ Energy Saving Tips for Consumers Sun, 09 May 2010 02:52:39 +0000 hourly 1 http://wordpress.org/?v=abc http://www.expresslightbulbs.com/getgreen/metal-halide-ballasts/2009/02/02/comment-page-1/#comment-13 Why are Ballasts needed? | Get Green Mon, 09 Feb 2009 17:15:02 +0000 http://expresslightbulbs.com/getgreen/?p=50#comment-13 [...] a lot of us, ballasts (i.e. Metal Halide Ballast) are a mystery. All distribution systems of Electrical output have fixed AC voltage (50 or 60 Hz) [...] [...] a lot of us, ballasts (i.e. Metal Halide Ballast) are a mystery. All distribution systems of Electrical output have fixed AC voltage (50 or 60 Hz) [...]

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