There are 4' long replacements for 4' fluorescent fixtures, using LED sources, and these come with plug in cords. I put two of these in our bathroom as replacements for two failed fluorescent fixtures (bad balasts) before we ultimately removed the drop ceiling and replaced the fluorescent fixtures with recessed LED can lights. They do come in choice of color temperature, and I chose 4000K LED 4' fixtures. (Ultimately, also chose selectable LED can lights and set them to 4000K.)
The 4' LED fixtures have so impressed me, that I kept them so they could be put into use to replace 4' fluorescent fixtures elsewhere, like in the garage and in our attic storage area.
This is what I bought from Amazon for 6 fixtures, $47
"(Pack of 6) Barrina LED T5 Integrated Single Fixture, 4FT, 2200lm, 4000K (Daylight Glow), 20W, Utility Shop Light, Ceiling and Under Cabinet Light, Corded Electric with Built-in ON/Off Switch "