Possible choices
T8 fluorescent troffers
CREE CR24/CR24 Led troffers which are claimed to match T8 troffers in terms of light output and price
Panel lights
More recessed lights (CR6) 3' - 4' apart.

What Davidtay said.

Philips TL950 fluorescent T8 tubes are amazing - 5000K and 98 CRI (which is lighting parlance for "looks like natural daylight" and "awesome color rendering" respectively). Less than $8/bulb from lighting supply. I usually put 2 of them in recessed 1' x 4' troffers with reflective grid type cover rather than a plastic panel (less glare, more contemporary aesthetic). Other sizes are available if needed, as are surface-mounted fixtures. Get as many as you need to cover your space.

I second the Cree CR14 recommendation (same as CR22 except only 1x4' instead of 2x4', looks neater IMO). Pricey but efficient, and certainly won't be mistaken for anything from the 1970s - think more 2020s. Not quite as daylight-y though, more neutral color (3500K version) or cool-white (4000K version).

CR6 round LED recessed lights are good if you like a traditional incandescent-bulb look but they use much less electricity (10 watts each). $40 each and they include built-in trim kit that would cost $12 if you used halogen floodlamp bulbs.

You can get fixtures fr quad T8 bulbs without having to use troffers.

Those and some strategically located recessed lights 9like over ed tables near a couch) should do the job.
Use separate switches and a dimmer for the recessed lights.