Electronic or Magnetic Ballast in typical desk or table lamps with normal bulbs?

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?

Most screw in florescent bulbs have a built in ballast.
All your ceiling units have a separate ballast.

This entry was posted on Saturday, January 30th, 2010 at 7:37 am and is filed under table lamps. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

3 Responses to “Electronic or Magnetic Ballast in typical desk or table lamps with normal bulbs?”

wildbill05733 on January 30th, 2010 at 1:24 pm

Most screw in florescent bulbs have a built in ballast.
All your ceiling units have a separate ballast.
References :
hung thousands of them….
Hondu on January 30th, 2010 at 2:08 pm

Incandescent bulbs don’t need a ballast and the screw in compact fluorescent bulbs have a built in ballast so if the lamp is a screw in socket type it has no ballast.
References :
andygroch on January 30th, 2010 at 2:38 pm

Electronic
References :

Everything Lamps