After very positive experiences with a GU10 3W LED spotlight, I was very disappointed with this 12V / 3W spotlights. One can allegedly 25W halogen lamps replaced, this is not even close to the case. And as already described at the supplier, the flickering spotlight easily. Without toroidal or special transformer it therefore can not. Possibly the voltage was for this spotlight, due to the not correct operation with a lot of power is too low, the reason for the insufficient brightness.