Overview 7C7/W: Voltage 120, Wattage 7, Base E12, Shape C7, Overall Length (mm) 54.1, Life Hours 3000, Color WHITE, Filament C-7A - Manufacturer: Westinghouse Titmus Optical - OB-7M Vision Tester - 7C7/W Replacement Light Bulb Custom Field Product Reviews Write a Review Write a Review × Titmus Optical - OB-7M Vision Tester - 7C7/W Replacement Light Bulb Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *