Possible Clues:

• 10,000,000 ergs per second
• One with his name in lights?
• Bassist Mike of the Minutemen
• Small bit of power
• What 'W' stands for on a light bulb
• James --, Scottish engineer (1736-1819)
• Unit of lightbulb power
• Speaker unit
• I hear a UU and a TT produce some power!
• See 17 Across