Get a dimmer switch. Something like this has worked for me. https://www.amazon.com/TOPGREENER-Table-Top-Dimmer-Incandescent-Halogen/dp/B07DL2HV9F/ref=mp_s_a_1_1_sspa?keywords=plug+in+dimmer+switch&qid=1661031877&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzRFlISVRFVDk0SVpMJmVuY3J5cHRlZElkPUEwMjI0NjI3MjFBWUZQRlhQQjMxRiZlbmNyeXB0ZWRBZElkPUEwOTQ1MTE1MUJYTUlCUFBSNDBBRSZ3aWRnZXROYW1lPXNwX3Bob25lX3NlYXJjaF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl