Light Sources
| Spark plug | 1500 K |
| Light bulb (40 W) | 680 K |
| Light bulb (100 W) | 2800 K |
| Halogen bulb | 3000 K |
| Neon tube (warm white)) | 3000 K |
| Neon (cool white) | 4000 K |
| Xenon lamp | Electric arc | 4500 - 5000 K |
| Midday sun | 5500 - 5800 K |
| Neon tube (daylight) | 5600 - 7000 K |
| Cloudy sky | 6500 - 7500 K |
| Blue Sky | 8000 - 12000 K |