Office lighting

[Rachie5272]

I'm trying to design a lighting system for my office.  It's a large open room, with high exposed ceilings.  There's a single conference table where all the work is done, with the rest of the room being ambiance.  It's an office inhabited by engineers, so we want to take the time to build a nice setup.

Things we care about:
-Quality of the light (Continuous spectrum.  I know CRI is a rather simplified metric.)
-Dimmable.
-Adjustable colour temperature.
-No flickering (high kHz PWM or true analogue).

Efficiency is unimportant, as we pay a fixed rate for electricity.  We're open to any type of fluorescent or LEDs.

At first I was thinking of getting a four channel DMX dimmer, and having a mix of high and low colour temperature lights.  Then I realized many LED panels have a 0-10V dimming system built in.  We could build a controller to automatically adjust the colour temperature based on the time of day, and have a single potentiometer as the user input.

Are LED panels very directional?  I was considering one or two such panels over the conference table, possibly adding a directional diffuser from a broken LCD monitor.  I'm uncertain how to do nice colour temperature mixing though.  Would separate fixtures look weird?

Does anyone have interesting ideas or suggestions?

[elecman14]

You should look at Intelligent lighting stage lights with an RGB led bulb. That would probably tick all the boxes for what you are looking for. They are quite flexible if your needs change and can be re-configured on the fly.

[Rachie5272]

We want adjustable colour temperature because bluer light is nicer during the day (closer to sunlight), while redder light is nicer at night (closer to fire, and doesn't suppress melatonin production).  And also because we can't agree on a single colour temperature.

[CopperCone]

get the most blue cold incandescent lights and put them in without a diffuser