Item No's15-0157-8115-0158-8115-0159-8115-0157-81: Small 280mm X 280mm118mm linear halogen lamp 150W Max15-0158-81: Medium 390mm X 390mm118mm linear halogen lamp 200W Max15-0159-81: Large 500mm X 500mm118mm linear halogen lamp 300W MaxFrost glass Satin nickel