The energy centers are often described as spinning wheels of light. That being said, though, the energy can express in any number of moving permutations. They can generate a pulsing, throbbing pattern or a sense of radiant expansion, almost a sparkling sensation. I notice that my experiences from day to day will vary and I am able to modulate them differently at different times based on what feels right in each instance.
So trust the process and accept whatever they are for you each time you meditate. That's what I love about Jeddah's approach, it is so intensely experiential that you really tune in to the greater meaning on a very personal basis.
Keep up the great work!