Buying LED bulbs is not complicated.
You only have to pay attention to 3 metrics:
* Lumens (how much light is emitted)
* CRI (Color Rendition Index, how pure or true to life the spectrum is). You pay more for higher CRI.
* Kelvin (color temperature)
Old-fashioned incandescent bulbs are 2700 K.
Halogen bulbs are 3000-3500 K.
CFLs and linear fluorescents are 4000-5000 K.
For under cabinet lights, we chose
https://americanlighting.com/3LC2 which provides "3-in-1 fixture design with 3 selectable color temperatures:
2700K / 3000K / 4000K
High color rendering (up to 90+ CRI)"
We are very happy with these lights. They replaced halogen lights.