Tungsten lamp with precision filament alignment to ensure optimal light output that is both consistent and reliable Replacement bulb for applications in the medical & scientific fields including microscopy, fiber illumination, surgical & dental overhead lighting, laboratory analysis, and diagnostics Wattage: 35W, Voltage: 6V, Base: G4, Average Lifetime: 50hrs Produced using patented quartz-pinch technology allowing for accurate positioning in medical & scientific equipment OSRAM provides high quality for the best long term value