The simplest and most common way is to coat a blue LED with a yellow phosphor.

最简单也最普通就是在蓝色LED上罩一层黄色的磷。

youdao

In addition, painted with phosphor, LED emitting blue light can be transformed to that emitting white light.

除此之外还有在蓝光led上涂上荧光粉，将蓝光转化成白光的白光led。

youdao

Two kinds of 1 W white high power light emitting diode (LED) were made by packaging blue chips from Taiwan and US. The chips were coated by the same phosphor and transparent silica gel.

制备了两种1 W白光功率发光二极管（LED）， 这两种样品分别是对台湾和美国两家公司生产的蓝光芯片， 涂敷相同荧光粉和透明硅胶封装而成。

youdao

Generally LED bulbs use either a combination red, green and blue LEDs to create white light, or they use a phosphor coating (more common) in combination with a blue LED.

ENGADGET