I can see that each LED is labeled. For example one of the LEDs is labeled CPU and flashes a blue light occasionally. A different LED is labeled VCCP1 and it slowly pulses a green light.
Just to head off obvious observations...
These are on board sensor indicator LEDS. They are indicating the state of temperature and voltage of various desktop board components. I'm looking for detailed information of what each color and flashing speed and time of the LEDs means.
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It's a bit gimmicky really. The VR lights just show which phases of the VR's are active. As the CPU switches various powerstates and ramps up and down perhaps many times a second the phases are switched on and off to supply power as required. This switching has always happened, just now they've added LEDs so you can see them switching on and off. I have no idea what you can do with that information, it's just a bit of "bling" I think.