Surely an incandescent bulb, being a black body radiator, has a CRI of 100? Yes, the temperature is low compared to sunlight, but the rendering is theoretically

Surely an incandescent bulb, being a black body radiator, has a CRI of 100? Yes, the temperature is low compared to sunlight, but the rendering is theoretically perfect. I suppose if you want to get closer to sunlight, you need a carbon arc, which is only a few hundred degrees cooler and again, a perfect black body emitter.