Philips Hadco uses bright white LEDs as standard,which are developed by coating a blue LED with a phosphor, and thereby generating a white color. Simply put, an LED, or Light Emitting Diode, is a diode that is chip-mounted in a reflector cup and held in place by a milled steel frame connected to a pair of electrical wires. When current flows across the junction of the two different materials, light is produced from within the solid crystal chip. Philips Hadco uses bright white LEDs as a standard, which are developed by coating a blue LED with a phosphor, and thereby generating a white color.