Many LED spotlights come with RGB/RGBW, tungsten or cool white. If yours comes with RGBW, you can achieve any desired warmer shade of white by adding the RGB diodes to the ccol white LEDs. But since this method does not necessarily result in the incandescent effect you may desire, you might be better off with a spot that casts only white light but in a variety of shades. Ideally, they cover the entire spectrum from warm to cool seamlessly.