Another method uses a blue LED and yellow or red phosphors. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

Instead of simply replacing the outdated bulb, we decided to build a small dark detecting circuit with 2 yellow LEDs based on this Evil Mad Scientist Laboratories design. After successfully ...

The culprit is not LED technology per se ... The light produced by an incandescent bulb has a yellow-orange color to it, which we accordingly describe as “warm.” In John Updike’s 1960 ...

The three most popular approaches are shown in Fig. 2a. These are a blue LED with yellow phosphors; an ultraviolet LED with blue and yellow phosphors (or red, green and blue phosphors); and a ...