SBC Bulb – 12V, 21W Vertical Filament (Spare Bulb for Lamp House Units)

This 12V, 21W SBC Vertical Filament Bulb is a high‑quality spare component designed for use with ventilated lamp house units commonly found in school science laboratories. It provides a bright, stable light source ideal for optical experiments, ray investigations, and practical demonstrations involving lenses, slits, and shadows.

The associated lamp house (not included) typically features an all‑metal ventilated body with an open front, extended finned sides for effective heat dissipation, and internal grooves to securely hold slit plates and cylindrical lenses. This spare bulb is compatible with such units to ensure continued, reliable classroom use.

Key Features

• SBC 12V, 21W bulb with vertical filament
• Provides bright, even illumination for optical experiments
• Ideal spare bulb for metal ventilated lamp houses
• Supports equipment with slit plates and cylindrical lenses
• Reliable performance for repeated classroom use

Ideal for School Science Lessons & Practical Activities

This SBC 12V vertical filament bulb is widely used in KS3, GCSE, and A‑Level physics lessons to support a range of light and optics investigations. It is ideal for:

• Ray‑box style experiments involving shadows, refraction, and reflection
• Demonstrations using slit plates with single or triple slits
• Optical path investigations using cylindrical or other lenses
• Exploring light intensity and behaviour under different conditions
• Supporting experiments requiring controlled, consistent illumination

Durable, bright, and designed specifically for educational lamp‑house systems, this 12V 21W SBC bulb ensures your optical equipment remains fully functional for engaging and accurate classroom demonstrations.