Quality and brightness remarkable given the low consumption, in cool white spectrum. By cons, information suggesting that they are intended to replace the self BAY15d capped lamp is totally wrong! That used in automobile has 2 filaments (15 W for stops or anti fog AR and 5 W for Night) each supplied by a plot for the positive and ground by the pellet. Or the LED lamp is delivered fueled by the negative base, but only one of the two pads feeds all LEDs, the other plot is unused to it. So if you place it on a car, you will stop, but not the back burner! Character because it suits me for the fire 360 ° mast of my boat!