Question

what is make a LED bulb

Answer 1

A LED lamp or LED light bulb is an electric light for use in light fixtures that produces light using light-emitting diode (LED). ... As of 2016, LEDs use only about 10% of the energy an incandescent lamp requires.

Answer 2

Diodes, in general, are made of very thin layers of semiconductor material; one layer will have an excess of electrons, while the next will have a deficit of electrons. ... The particular semiconductors used for LED manufacture are gallium arsenide (GaAs), gallium phosphide (GaP), or gallium arsenide phosphide (GaAsP).