Ushio BC2966 Healthcare Medical Scientific Light Bulb

The Ushio BC2966 is not a general-purpose light source — it is a precision halogen lamp engineered for the exacting optical and electrical demands of medical, healthcare, and scientific instrumentation. Operating at 33V with a 235W draw, it produces 4500 lumens through a frosted T3.5 quartz envelope mounted on a Gy9.5 bi-pin prefocus base. That prefocus base is the key detail: it positions the filament at a precise, repeatable location within the instrument's optical path, ensuring that the luminaire, microscope, or diagnostic device it powers maintains its designed beam geometry and illumination uniformity. In precision optical applications, filament position variance of even a millimeter can degrade imaging quality — the BC2966's prefocus design eliminates that variable.

The frosted envelope softens the raw filament point source into a more diffuse, even illumination field, reducing glare artifacts that could interfere with clinical observation or laboratory measurement. At 235W, thermal management is a real operational consideration — this bulb runs hot by design, which is intrinsic to halogen technology's ability to maintain color temperature consistency over its rated life. Ushio's manufacturing quality control produces consistent filament geometry and envelope integrity batch to batch, which matters in instrument calibration environments where a new lamp should not require recalibration of the optical system. For facility managers and lab technicians sourcing replacement lamps for precision instruments, the BC2966 is a specification-matched, professionally manufactured consumable that performs to its rated parameters reliably.