Select from a large variety of lamps: Standard Diachronic Lamps (50mm diameter) - 20 watts and 35 watts, top quality glass front lamps, life 3,000-4,000 hrs, these lamps give excellent clarity of light, allowing you to maximize the brightness you can achieve; Extra Long Life Lamps - 50 watts, life 10,000 hrs, excellent value, save time and money by purchasing these extra long life lamps, more than a years life, based on 24hrs a day usage; Colored Lamps (50mm diameter) - 50 watts, available in silver (SI) or black (BL), lamp life 3,500 hrs, light projects forward only, the external casing of the lamps is colored either silver or black...