Nonstandard, bad Geldmacherei

Beautiful lamp socket in standard size E27, in which unfortunately fits almost any bulb in the world !!!
The manufacturer has the copper sleeve is shaped to fit only their own, over-priced lamps, nothing else! That borders on deception!
Maybe with the hacksaw to saw off a portion of the copper ring or an adapter to buy that ugly Plumen energy saving lamps do not come to me at any rate in the house!