Here is the RV dimmer switch for LED lights I wanted to post.
JR Products 15225 Black LED Dimmer On/Off Switch https://www.amazon.com/dp/B00C88ASPO..._hPmowbH8J0XB0
Please note you will need to have both the positive and negative power wires at the light switch location for this switch to work. Reading the reviews on Amazon one person ran into this problem, so you might need to run an additional wires from the first fixture to the light switch.
You might be able to use a dimmer for the strip LED lights that have a remote control. These dimmers would be mounted in a cabinet above the lights where you have access to both positive/ negative wires running to the fixture(s). Note these typically will not fit in the wall in place of the standard wall switch.
iPhone 6S using Tapatalk