I can add the under cabinet version of my kitchen.
Looked for thin LEDs at a local supply house/lighting showroom. Not crazy high end, but mid range. Sales lady took my cabinet layout and punched the info into the mfg layout program. A minute later printed the mat'l list and pricing. Shock me and wife. Asked her if they offered a contractor price/inspector discount. That resulted in 10%.
Still was >$1600.00
Looked around more, found something at the 'Blue' big box. LED, dimmer within the unit, 120volt feed, plug together capability, and no where near the cost. 120 volt to a surface mount box w/toggle and two (2) receptacles for mfg cabling connections. Mount units, connect cables, & done.
Working fine for the last four years .