However, colored led diodes are used for the rear lights (e.g., red) what is the best led color for fog lights? Lower kelvin numbers mean the light appears more yellow while higher kelvin numbers mean the light is whiter or bluer. Robot Check Led Ceiling Lights Dimmable Led Lights Led Ceiling Because color temperature is hard to photograph accurately (mostly due to white balance), we recommend referring the the first color temperature chart (above) for reference. Led headlight color temperature chart . Bright white (5000k) this is the most popular xenon headlight color temperature. Best for display areas and work environments where very bright illumination is needed. This is true for led lights as well as any other type of light bulb. That’s why bulbs that range between 3000k and 4300k on the led headlights temperature chart are the best choice. Higher kelvin temperatures result in cooler colours while lower k temperatures indicate warmer colours. To give reference, they a...