I really like l.e.d. ribbon. Very inexpensive....
http://smile.amazon.com/gp/product/B002Q907EW?psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00
Add power supply...
http://smile.amazon.com/gp/product/B00DKSI0S8?psc=1&redirect=true&ref_=oh_aui_detailpage_o08_s00
The last one I did, I tried a diffuser channel and really liked the finished look...
http://smile.amazon.com/gp/product/B00PJSUZSK?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00
One word of caution. Many people don't consider voltage drop because of the low wattage - 24 watts for a 16' roll. But at 12 volts, it doesn't take a lot of length to have drastic results.
I went to troubleshoot some ribbon in a kitchen earlier this year. 2 sections of ribbon, left and right of the stove. Left side was 2' long, right side 8' long. Transformer was in the lower cabinet to the left side of the stove.
An 18 gauge wire ran up to the short ribbon, then daisy-chained to the 8' ribbon. The long section was the furthest away, and it was considerably dimmer than the short section.
The voltage at that long section was a little over 11 volts, but 12 volts at the shortest section.
What I typically do is put the transformer under the sink, and run a separate feed to each section. I add the ribbon length to the wire length and get them close to the same. That might mean running wire to the farthest end of a short section, etc.
Also, I just had a warranty call Friday on some ribbon I used to back light an alcove sign. It was blinking and flickering erratically. This was wired back in February, and I had no options for transformer location except attic. The transformer had gone bad.
I'm wondering if the summer heat took a toll on it - ambient temperature plus transformer heat. I know heat has been an issue with various l.e.d. drivers, such as in corn bulbs, A-19 style, and others, when enclosed.