Did you get your E27/E26 bulb and socket thing squared away?
I went through the same thing just about 2 weeks ago, I bought some 68 watt CFLs, and some of those clip on socket reflectors,
and the bulbs were too big to fit in there, they needed an extension. The bulbs were E26, the socket reflectors were E26, and
I could only find E27 extensions. I bought them and they fit perfectly. Apparently there is a slight difference, but not enough for
them not to be compatible.