Cabinet Light Project - Part 1

I really want to replace this terrible light fixture under my cabinet:

It shines light right into your eyeballs and give you a headache. Not ideal.

To replace this, I want to build one! But a little fancier. I want to have:

• The light to not shine directly into my eyeballs
• Granular power controls
  • Turn a section on or off
  • Turn all on
  • Turn all off
• Color controls
  • Modify the color to be any RGB - ideally warm white or cool white (I like a brighter cool white while my GF likes a warm white)
• A nice wooden housing

I already know a lot about individually addressable leds, and to have a good 'white' color I think I'm going to use a RGBW light, which has 4 LEDs in it instead of the normal 3, including a 'white' LED. This helps have a non-weird white color (and save power).

vs

Main Idea:

• 12 ft long
• 4 buttons on the back to control on-off on 3 foot sections
  • Do something to turn all on (long hold? double tap?)
  • Do something to turn all off (long hold? double tap?)
• 3 knobs to control RGB color of the light

Here are some sketches of the wooden structure, and notes from chatting with friends.