I don't know which light bulbs are the best but here is the information for the light bulbs that we used for the December SyncCreation workshop. They worked for me and everyone else in the group (to the best of my knowledge). I personally liked them a lot because they were easy to hold with both hands and I have always associated circles with continual energy (no beginning and no end type stuff) and fluidity which assisted me.
Here is the information:
GE, cool white 32w round light bulbs - You can get them at your local hardware store.
Here is a link to them online so you can see what they look like:
http://www.thefind.com/homefurnishings/info-g10q-4-pin
4 Ever - Mr. Rogers
Nurturing greatness and being nurtured by the greatness in all!