> LEDs can only shine at one brightness, they're either on or off, This is factually incorrect. LEDs shine at a range of brightnesses. The amount of light emi

> LEDs can only shine at one brightness, they're either on or off, This is factually incorrect. LEDs shine at a range of brightnesses. The amount of light emitted is related to the amount of current flowing through the LED, which you are free to control however you want. The cheapest way to do this is to use something like PWM and monitor the average current flowing through the LEDs. However, you can also just use a constant current source, and adjust it to provide the amount of current that you want. I don't know where the idea comes from that LEDs are only on or off. There's no basis in fact here, as far as I can tell.