i have dumb quetion. . .(idk anything about lamps)

940nm, 850nm, 660nm, 630nm, 610nm, 590nm
570nm, 530nm, 510nm, 470nm, 460nm, 400nm
what is nm ???is that size of the LED lamp?

for good growing you need blue, red and deep red spectrum.
whats differences between normal led and full spectrum led?
can i just use normal LED Lights?