LED Dimmer headaches

[mainline]

Mainline: sorry for my delay. At my age I'm just not moving as fast as I used to in the past.
After each 'trial' solution I need to restore the toggle so we have lights each night. Then there is the fun of going up and down the basement stairs to and from the circuit breaker.
What probably would take you 30 min will take me much, much longer.
Today I hope to get out and find some incandescent bulbs to try out.

I appreciate all the comments and suggestions made so far - they've all sounded both logical and understandable and I've appreciated that.

Thank you all for your help.

No problem, let us know how you get on.