There is nothing natural about the look of incandescent lighting. It is very yellow and nothing like natural light. With flourescent lighting there is a wide variety of lamp types that emulate natural light, such as the 5000K lights whih are very close to natural sunshine in colour temp. The 6500K daylight lamps are already trending towards blue, and more closely emulate early morning or late afternoon light. On top of this, there is the CRI, Clour Rendition Index to consider, which will tell you how well a lamp will render colour. The closer to 100 that number is the better it will render colour.