Measured Voltages at 20 mA:
Deep red 660 nm Gallium-Aluminum-Arsenide (AlGaAs) 1.8 Volt
Red 630 nm Gallium-Indium-Phosphide (AlGaInP) 1.9 Volt
Orange 610 nm Gallium-Arseen-Fosfide (GaAsP) 2.0 Volt
Amber 592 nm Gallium-Arseen-Fosfide (GaAsP) 2.0 Volt
Yellow 585 nm Gallium-Arseen-Fosfide (GaAsP) 2.0 Volt
Yellow/Groen 565 nm Gallium-Nitride (GaN) 2.1 Volt
Green 525 nm Gallium-Fosfide (GaP) 2.2 Volt
Turquoise 505 nm Zink-Selenide (ZnSe) 3.0 Volt
Blue 470...430 nm Zink-Selenide (ZnSe) 3.3 to 3.5 Volt
Violet 420 nm Indium-Gallium-Nitride (InGaN) 3.2 Volt
Ultra Violet 400...380 nm Diamant (C) 3.5 Volt
White 400...380 nm Silicium-Carbide (SiC) +Phosphor 3.3 Volt