This 18 watt low energy Osram Dulux D/E 4 pin compact fluorescent with a G24q base has a compact design and is dimmable with HF electronic control gear. The quality triphosphor coating gives this energy efficient compact fluorescent lamp excellent colour rendering. Ideal where light is required for extended time periods and in recessed ceilings where space is tight such as offices, shops, reception areas and entrances. Please be careful choosing your lamp as you can only replace like for like wattages.