Electronic or Magnetic Ballast in typical desk or table lamps with normal bulbs?
Posted on 01 September 2010
In a typical desk light where you can screw in a normal
incandescent or flourescent bulb, is this an electric or a magnetic ballast? Is there a way to tell?
Thanks for the answers so far. Is the built in ballast in screw in flourescent bulbs electric or magnetic?
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2 responses to Electronic or Magnetic Ballast in typical desk or table lamps with normal bulbs?





Most screw in florescent bulbs have a built in ballast.
All your ceiling units have a separate ballast.
If they don’t have a built in ballast, how would you find out?