This is a 12 Volt, 50 Watt Tungsten Halogen lamp, identified as Model D1, specifically designed as a visible light source for spectrophotometers. It provides stable, continuous illumination across its effective wavelength range of approximately 340 nm to 1100 nm, meeting standard quality requirements for photometric analysis.

High Stability: Engineered to provide stable light intensity output (after warm-up) crucial for accurate photometric measurements.
Good Intensity: Delivers sufficient brightness in the 340 nm to 1100 nm range for typical absorbance/transmittance measurements.
Long Operational Life: Offers a defined lifespan under standard operating conditions (rated hours vary by specific bulb model).