Try a 5000k tube, which is close to natural sunshine, more so than the 6500K tubes. Incandescents give a very yellow light of around 3000K which I can't imagine anyone liking, as it is not at all natural. There are tubes in the 3000k range, and all are available at Home Depot and similar stores. The closest to incandescent is probably Warm White. Also there is nothing yellow about a 6500K tube, nor is 6500K a low K
value.The most commonly used lights in commercial and residential lighting are all under 5000K. Sunlight at noon at the equator measures about 5500K, not the 6500K of the so called Daylight tubes. They are closer to early morning or late afternoon sun.