We’re going to get technical here: an amber LED is different from a warm white LED. While both are yellowish, the amber LED is a direct color LED. The silicon die in an amber LED produces photons with an amber color. A warm white (WW) LED has a silicon die that produces blue photons. The blue photons are partially converted to yellow by phosphor, which is applied around the die. The mix of blue and yellow photons results in a warm white color. The phosphor-converted LEDs generally have a much better Color Rendering Index (CRI) than direct color LEDs.