I am using LED strip lights for my cove lighting (40 feet in the kitchen and 56 feet in the living room). I am probably going to use the single density (18 3528 LEDs per foot, about $1 per foot), and two strips -- cheaper than one double-density strip. Similar cheap supplier to Hitlights, LEDwholesalers.com. I'm using a Magnitude 150W dc transformer for the kitchen, and a Technomagnet 300W one for the living room, and magnetic low-voltage dimmers. I'm using the Lutron MFRD-6ND-120 dimmer, which is pricey, but it allows dimming from multiple locations, as well as by RF remote. I didn't have the time/energy to find a cheap LED solution for undercounter, so I am using hardwired GE fluorescent lights, which are approximately $20 per foot. No idea what my contractor is charging for install. I'll be doing the LED strip install, but he will wire up the 3-way dimmers to the transformers and run the low voltage wires to the coves, and the 120V for the UCL fluorescents.

If you have attic access above the ceiling you're talking about this is likely most easily solved by 3 trades, finish carpenter, so they can add a little moulding to what is there to create your cove, electrical for the light install and a painter to paint it all up! Plan to repaint the whole ceiling. If not, plan to paint the whole room and add a drywall person to the mix for the patching. Good luck!

If you llike lighting made in China with no warranty and BTW 4000K is the better color for lighting. then go ahead . I much prefer to deal with an actual lighting store that I can have access to if I have an issue.

Talk to a designer for free at InspiredLed.com They will figure out exactly what you need, all the bits and pieces, show you the design and then you complete the purchase. I had a super positive experience with them recently and the price is very, very reasonable. As far as screws versus sticky - I had initially planned to use screws and ordered that type, but once I saw how lightweight the lights were and how itty bitty the screws are, I bought a package of the “command” poster squares and used those to hold the lights up. Looks totally flawless.