For me, the lamps are unfortunately unusable because they flicker too strong.
Order now other.
UPDATE 11/03/2014
+ No Einschaltverzögerug
+ Light color good
+ No flickering (with transformer for LEDs)
Must correct my rating (from 1 star to 5 stars), because the commentator with a reference to the wrong transformer was right.
Now have a transformer for LEDs (0 - 60 Watt) bought, and the lamps no longer flicker.
For the price really a very good LED.