Mixed flourescent lighting for documenting paintings?

When you say that you 'document' paintings, do you mean for some official purpose or just for your own interest?

If it's for the gallery then spend some money on a couple of light stands and fit them with tungsten bulbs. Set them up either side of the painting and turn alll the other lights off.

As someone else has said, fluorescent lighting does not have a continuous spectrum and what looks white to the eye can be very different to a camera. Tungsten avoids all this.

--
Albert
Every photograph is an abstraction from reality.