2' X 2' Flat Panel LED Lighting

3500k lights are the yellowish (warm) light. I personally hate that color spectrum. My basement has no natural lighting so I installed 5000k lites which is Daylight and I love them. They are also dimmable.

If you want those lights we use Lithonia lighting when doing retrofits and they make very good lights. Those 2x2 panels you've mentioned are also very slim in case your drop ceiling height is tight to the joists.

Here is the cut sheet on those lights with the lumen output.

EPANL Flat Panel - Fully-Luminous LED Flat Panel