Replacement bulb for Swiss HS366 — 6V 4.5A nine‑hole incandescent lamp designed for slit lamp and microscope use. This directfit replacement restores proper illumination and optical performance for instruments that require a 9‑hole screw mount 6V bulb. Why you need it Restores accurate, steady illumination for slit lamps and optical microscopes that use the Swiss HS366 specification. Minimizes downtime and avoids calibration shifts caused by dim or failed bulbs. Straightforward, reliable replacement that matches the original 6V 4.5A electrical specification. Key features and attributes Model compatibility: Designed as a replacement for Swiss HS366. Electrical rating: 6 volts, 4.5 amps — matches the original equipment requirement. Mount type: Nine‑hole screw mount (9‑hole) for secure, correct seating in compatible sockets. Light type: Incandescent lamp providing warm, continuous illumination suitable for slit lamp and microscope applications. Construction: Precisionmade bulb body for consistent light output and secure installation. Performance: Stable illumination at rated voltage and current to maintain image clarity and contrast. How this bulb solves problems Replaces failed or dim bulbs with a component engineered to the same voltage and current ratings as the Swiss HS366, ensuring consistent optical performance. Prevents image degradation caused by underpowered or mismatched lamps. Easy to install, reducing service time and restoring normal use quickly. Applications and use cases Ophthalmology: Replacement lamp for slit lamp microscopes used in eye exams and clinical diagnostics where precise illumination is required. Laboratory microscopy: Restores consistent lighting for laboratory microscopes used in inspection, sample preparation, and teaching. Equipment maintenance: Spare bulb for service technicians and clinics that need compatible, quick replacement parts for Swiss HS366 fixtures. Installation notes Install by screwing the bulb into the compatible nine‑hole socket until it seats securely. Ensure power is off before replacing the bulb. Confirm the instrument is specified for a 6V 4.5A nine‑hole incandescent lamp before installation. Compatibility reminder Intended specifically for instruments that require the Swiss HS366 6V 4.5A nine‑hole screw incandescent bulb. Verify compatibility with your device's specifications prior to .