The LC3010 requires a 12VDC power supply with current depending primarily on brightness settings.  

80mA       static image mode, illumination LEDs off
2.2A       static image mode, illumination LEDs max (768,1023,1023)
2.3A       pattern mode, green LED max at ~100% duty cycle

Power is supplied through the barrel connector J7 or through pins on the main I/O connector J10.

The LC3010 is not shipped with a power supply included.  If using the barrel connector any 12VDC supply with sufficient amperage rating and a standard 2.5x5.5x9.5mm plug will work.  For internal testing Keynote uses Delta ADP-66CR which is available from multiple distributors.