The approach I would take would be as follows
1. Envisage the possible usage (imagine what you could do) and desired look - invariably, they will be used for ambience as well as task lighting.
2. List out your constraints including physical constraints imposed by your cabinetry. For example -
a. low profile b. low heat output.
c. color of the light output.
d. direct wire to 120V or low voltage.
e. ability to dim the lights.
f. total cost of the entire system - all interconnecting parts, installation, light bars, power supply (sometimes loosely called transformer)

3. Price out the entire system - not just the bars.

The linked discussion has quite a number of details

Here is a link that might be useful: LED UCL continuation