Is there any way to tell the orignial manufacturer for own brand CFLs like Morrisons, Sainsbury, Tesco Etc?
These are often sold quite cheaply, but seem to be of variable quality. I've had good experience with IKEA (although my closest store is about 30 miles away, so it's not practical to go there just to get some bulbs), but bad experience with Sainsburys and Morrisons.
Before someone says "you get what you pay for", I would say I don't find this to be true with CFLs, as I've had some pretty rubbish branded ones as well. In particular Phillips seem bad to me.
I'm also guessing that supermarkets may change supplier from time to time, so the fact that I had a bad experience with Sainsburys bulbs a few years ago might not mean they are still bad.
I'm assuming that the supermarkets don't actually manufacture their own CFLs of course.
So is there any easy way to know or determine the original manufacturer?