I am making a lamp that will have the following components (in order of flow of electricity from wall socket to bulb):

  • Type A plug, 120 V

  • On/off push button with alternate action (if I understand the terminology correctly this means press to turn on, press again to turn off, and the button surface returns to neutral position between presses)

  • Rotary dimmer: I am planning on using one made for a home wall, such as one by leviton or lutron, etc.

  • Light socket for A19 light bulb (the stereotypical bulb in homes) which will have a dimmable LED bulb

Here’s an visual aid: enter image description here

With this arrangement the light can be kept at the desired brightness while being turned on and off. I understand that the rotary dimmers I am planning to use have on/off push buttons built in, but for this design I need a separate on/off button.

The help I am hoping to find is… What specs should I look for in a suitable push button to ensure compatibility with the plug and the wall dimmer?

I imagine I may not be providing enough information; if so it’s just my ignorance and I will be glad to gather the needed info.

Thank you in advance for any help!

  • \$\begingroup\$ Not an answer, but a web search for "SPST push-on/push-off switch" provided several possibilities. As the answer says, you need to check both voltage and current ratings. \$\endgroup\$
    – Bob Brown
    Commented Aug 21, 2022 at 16:43

1 Answer 1


You need to look for a switch that is rated for (at least) 120 V AC and (at least) as much current as your bulb will draw. If you use an incandescent bulb then remember that it draws a larger current when it is cold.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.