Please clarify what you mean in your question in future. There are too many definitions of 'power' in Pokemon, so we cannot know for sure.
To answer your question, 60 is the number you'd want for the highest effectiveness.
Technician works with moves that have up to 60 Base Power. So ideally this would be the Base Power you want for a move, if you want the highest power. This means moves like Aerial Ace and Bug Bite will have 90 base power instead of the lowly 60. Technician still works otherwise, so long as the move's Base Power is 60 or less.