8000-20,000k 

6500 k daylight

4000 k cool white
 
3500 k
 
3000k halogen white

2700 k warm white

2000-2100k-hps orange

65K for me!

10K

6500k

Lately I've been converting to 5000K full spectrum fluorescents (Duro-test Vita-lite and Sylvania Design 50) but still keep some classic cool whites around.

BTW....don't forget about the 3500K 'white'....used on some of the earliest lamps and still used today but with triphosphor instead of halophosphates.

@don93s thanks,for pointing that out.

Also 14K is awesome!

About 5000K, The light from these tubes is nice.

I have to agree! I have a set of C50's in F20T12 ecojunk but they still work perfectly!

4100K

Any of them. I don't care of they have crappy CRI, if the general color temp is 4100K, it's perfect. Long live cool white!

8000-20,000k 

6500 k daylight

4000 k cool white
 
3500 k
 
3000k halogen white

2700 k warm white

2000-2100k-hps orange

2700K and 2100K Golden color ,and warm White, Bright daylight colors give me headaches.

@nineaclock so anything above 4000k gives you a headache?

does anybody prefer low pressure sodiums yellow light.

I do along with any other color temp!

I like Cool Green! What's the color temp?
I also like Westy Supermarket White, 4500K I think.
4100K is my favorite.