3. Color Temperature (K)

The color of the bulb is called the color temperature. The lower the value, the more yellow/red the bulb color is. The higher the number, the whiter/bluer the light. The color of the bulb is yellowish, the color temperature is about 3000K, and the color of the bulb is white, the color temperature is about 5000K~7000K.

4. Color Rendering index (Ra/CRI)

The higher the color rendering index is, the closer the color of the object displayed under the light source is to that under the sunlight, and the smaller the color distortion degree is. The lower the color rendering index is, the farther the color of the object under the illumination source deviates from the color under the sunlight, and the greater the color distortion degree.

5. Luminous flux/lumen (lm)

Refers to the light energy released by the light source. Generally speaking, the higher the lumen value, the greater the brightness of the bulb. So be aware that many people simply think that the higher the wattage, the brighter the headlights.

6. Luminous efficiency (lm/W)

Refers to the light flux output per 1W of electricity consumed by the light source, is the judgment standard of whether the bulb saves electricity.