GE 29947 | DRS 1000W 120V | High-Intensity Projection Lamp

The GE 29947 (ANSI Code: DRS) is a professional-grade, high-intensity tungsten halogen lamp engineered for legacy projection systems and specialty optical equipment. Delivering a massive 28,500 initial lumens, this 1000W lamp provides the brilliant, full-spectrum light required for commercial film projectors, overhead transparencies, and stage lighting. Its P28s Medium Prefocus base ensures the C-13D filament is perfectly aligned within your fixture's optics for maximum screen brightness and clarity. With a 3325K color temperature and a perfect 100 CRI, the DRS lamp offers exceptional color rendering for critical medical and industrial imaging applications.

Product Overview

As a specialized photo-optic source, the GE DRS lamp is built with a heavy-duty T-20 tubular bulb shape and a precision flanged base to maintain a strict 2.188" light center length (LCL). This precision is vital for legacy equipment from brands like 3M, Beseler, and Buhl, where even a slight misalignment can result in uneven illumination or hot spots. Designed for Base Down operation, this lamp requires robust forced-air cooling to manage the extreme heat generated during its high-output service. Its reliable performance makes it the trusted choice for flight simulators, theatrical spots, and opaque projectors worldwide.

• Optic Precision: Medium prefocus base locks the lamp into the exact position required by high-magnification lenses.
• High Efficacy: Delivers one of the highest lumen-per-watt ratios for 120V tungsten projection lamps.
• Full Spectrum: 100 CRI ensures that colors on the screen appear vibrant and accurately represent the original media.
• Vintage Compatibility: Primary replacement for discontinued specialty lamps used in classic slide and film equipment.

Technical Specifications

• Brand: GE Lighting
• ANSI Code: DRS
• Product Number: 29947
• Wattage: 1000W
• Voltage: 120V
• Base Type: P28s (Medium Prefocus / Flanged)
• Bulb Shape: T-20
• Color Temperature: 3325K
• Initial Lumens: 28,500 lm
• Rated Life: 25 Hours (Standard) / 50 Hours (Optimal)
• Burn Position: Base Down (within 30° of vertical)
• Dimensions: 5.75" MOL x 2.5" Diameter

Safety & Handling Information

• Extreme Heat: This bulb operates at temperatures exceeding 500°C. Ensure the projector's cooling fan is fully operational before and after use.
• Installation: Disconnect power and allow the fixture to cool for at least 15 minutes before replacement.
• Handling: Never touch the glass envelope with bare hands; use a clean cloth or gloves to prevent skin oils from causing premature bulb failure.
• Operating Position: Burn only in Base Down orientation. Horizontal or Base Up operation will result in immediate lamp failure or damage to the fixture.

Primary Applications

• Theatrical Lighting: High-output stage spots and specialty effects lighting.
• Legacy Projection: 3M overhead projectors and 16mm/35mm commercial film equipment.
• Scientific Imaging: Medical transparency viewers and industrial opaque projectors.
• Simulation: High-brightness light sources for legacy flight and maritime training simulators.