I wonder if they will give enough light. Can you buy one and test it?

You can try the Philips 120 volt LED under cab. Very bright and dimmable.

I'm sure it's more expensive, but it's also much better quality.

Here is a link that might be useful: Philips Under Cabinet 120V LED

My Sams club had plug in LED cabinet lights - I think from GE. Don't see them online though.

I purchased these for my UCL. I think they're great! They use 120 Volts and a regular dimmer too! No worries of connecting a separate driver.