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What is the reason for one side of the LED headlight suddenly turning blue?

1 Answers

EmmanuelDella

07/29/25 12:41pm

There are several reasons why one side of an LED headlight may suddenly turn blue: increased current and the application of fluorescent powder on the vehicle. Below are the relevant explanations: 1. Increased current: If the white light of an LED appears overall purplish, the higher the color temperature, the more the light tends to appear blue. White LED lights are based on blue LED chips. The reason why white LED light appears blue is due to excessive voltage (or current) being applied to the LED product. As the driving current increases, the color temperature of the white LED light rises with the increase in current. 2. Application of fluorescent powder on the vehicle: Most white LED lights are blue LEDs coated with yellow fluorescent powder, which mixes to produce white light. Over time, some of the fluorescent powder ages and turns black, losing its effect, causing the light emitted by the LED to appear blue.

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