Can a bad wall switch blow out the ballast?
A bad wall switch can blow out the ballast. If there is bad switch, ballast broken or worn out, the ballast can blow or lights will not operate properly or at all. Electronic ballasts are easy to replace with a little preparation, some simple wiring and basic tools. Read more from http://www.ehow.com/how_8051240_electronic-ballast-installation.html#ixzz1s2200Bcv.
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A bad switch means you have a bad connection which causes a fluctuation of electric current. Current fluctuations are damaging to ballasts and other electrical equipment. When replacing a switch, It is best to use the commercial grade switches.