Osram Dulux T/E bulbs are energy saving lamps. The base is called the GX4q-4 and has four pins. This type of Osram Dulux lamp is available in colors ranging from extra warm white light to cool white light. The available wattages range from 13W up to 42W. Use the color and wattage of your current lamp to chose your new one, that way you will keep the same light effect.