Osram Dulux D/E bulbs are energy saving lamps with a 4-pin G24q base. The Dulux D/E is available in colors extra warm white, warm white, cool white and daylight. Warmer colors are mostly used in homes or the hospitality industry while cool white light is mostly used in offices or schools. Daylight is mostly used in hospitals. You can also choose the right wattage. Make sure to keep the same amount as your current light to maintain the same lighting effect with your new Osram Dulux D/E lamp.