Editing Light-emitting diode (section)

=== Mixed white LEDs ===
[[File:Led Lights Panel.jpg|thumb|Tunable white LED array in a floodlight]]
There are RGBW LEDs that combine RGB units with a phosphor white LED on the market. Doing so retains the extremely tunable color of RGB LED, but allows color rendering and efficiency to be optimized when a color close to white is selected.<ref>{{cite web |title=All You Want to Know about RGBW LED Light |url=https://www.agcled.com/blog/all-you-want-to-know-about-rgbw-led-light.html |website=AGC Lighting}}</ref>

Some phosphor white LED units are "tunable white", blending two extremes of color temperatures (commonly 2700K and 6500K) to produce intermediate values. This feature allows users to change the lighting to suit the current use of a multifunction room.<ref>{{cite web |title=Tunable White Application Note |url=https://support.enlightedinc.com/hc/en-us/articles/360031886233-Tunable-White-Application-Note |website=enlightedinc.com}}</ref> As illustrated by a straight line on the chromaticity diagram, simple two-white blends will have a pink bias, becoming most severe in the middle. A small amount of green light, provided by another LED, could correct the problem.<ref>{{Cite web|url=https://leducation.org/green-light-can-maximize/|title=2021 How Green Light Can Maximize the Quality of Tunable White – LEDucation|website=leducation.org}}</ref> Some products are RGBWW, i.e. RGBW with tunable white.<ref name=EG.COL.T>{{cite web |title=Understanding LED Color-Tunable Products |url=https://www.energy.gov/eere/ssl/understanding-led-color-tunable-products |website=Energy.gov |language=en}}</ref>

A final class of white LED with mixed light is dim-to-warm. These are ordinary 2700K white LED bulbs with a small red LED that turns on when the bulb is dimmed. Doing so makes the color warmer, emulating an incandescent light bulb.<ref name=EG.COL.T/>