Thanks folks for all your advice. The bulb unit is clipped on into the bulb holder. Had to pry it out gently and the unit comes away hanging on the wires. I removed the bulb and it is printed on the back, 30 degrees, 12v 10w. The bulb has 2 tiny pins. It is halogen. Question is, what wattage will I need for a LED. I would like it a bit brighter. Appreciate your advice. Thanks.