The actual power consumption is 1.5 watts and is constant up to 16V (tested), so it's a built-in voltage regulation, so that the LEDs do not go the same broken when the transformer is operated under rated load. The light output is good but does not match with security 25W halogen. My LEDs are all pretty cold warm white. How long do LED lamps to be seen. I distrust the design slightly, because what is not so clearly visible in the pictures, the part is a solid cylinder made of relatively soft plastic. Mir is not clear whether that is enough to remove the heat. As others have written that compared to normal bulbs large dimensions must be observed when the LED lamps to be somehow built: Length approx 32mm (without connections), diameter approximately 15mm.
