We bought a Ton of lights from
Greeled.
We made a huge group purchase from there of both RGB and addressable.
Here is the RGB we bought, at about $32 a 5m roll with glue cover waterproofing.
They sell the same addressable strip as Adafruit for something like $85 per 5m roll with no waterproofing. It was a breeze to program on arduino using Adafruit's library.
You have to email for current pricing and to order, and I think payment might have involved wiring money, but it sure was worth it.
I should have a pic of my desk up later which has the RGB lights on it.