Swan Eco Halogen Golf Ball lamps offer an excellent energy saving alternative to a regular Household Golf Ball Lightbulb. Our 18w BC Bayonet fitting, Swan Eco Halogen Golf Ball Lightbulbs last 2000 hours, twice as long as a regular Golf Ball Lightbulb and also save 30% in electricity. They are fully dimmable on any dimming system and come up to full brightness instantly. We are now selling Swan Eco Halogen Golf Ball lamps in a 10 pack , offering even greater value for money.