Incandescent light colour follows the Planck curve so that when dimmed or used at lower wattages, the light colour gets proportionally warmer and more candle like. Increase brightness or use a higher watt lamp, and it gets whiter again. This is how a natural light source behaves. Whereas LED and CFL gets more blue, green or grey, even if they were reasonably warm-white at full power
解釋左光源既顏色,不只是色温,暫時LED技術未做到烏絲效果,所以烏絲光會比LED柔和.