Product Overview
Osram 54411 - DNF 150W 21V Halogen MR18 Reflector Lamp
The Osram 54411 (ANSI Code: DNF) is a high-intensity 150-watt halogen reflector lamp engineered for precision optical systems. Featuring a GX7.9 Vented Base and a specular MR18 reflector, this lamp delivers a brilliant 3400K beam. It is primarily used in 16mm movie projectors, microfilm readers, and specialized medical imaging equipment where a consistent, high-intensity focal point is required.
Technical Specifications
| Osram Part Number | 54411 (93631) | ANSI Code | DNF |
| Wattage / Voltage | 150W / 21V (21.5V) | Working Distance | 69.1mm (Focal Point) |
| Base Type | GX7.9 (Vented 2-Pin) | Color Temp | 3400K |
| Avg. Rated Life | 25 Hours | Filament | CC-8 |
| MOL (Length) | 45.1mm | Diameter | 57.2mm (MR18) |
Professional Optical Performance
- Specular Reflector: High-efficiency coating ensures maximum light concentration at the 69.1mm working distance.
- Vented Base Design: The GX7.9 base is specifically designed to allow air circulation, protecting the lamp and socket from thermal stress during the 150W operation.
- Optical Alignment: Precision-mounted CC-8 filament ensures a uniform, flicker-free beam for clear projection.
- Compact Form Factor: The MR18 shape is designed to fit standard 16mm and microfilm optical trains.
Common Applications
- 16mm Motion Picture Projectors
- Microfilm & Microfiche Readers
- Specialized Photo-Optic Equipment
- Scientific Imaging Devices
⚠️ Professional Handling & Safety
- Voltage Precision: This is a 21V lamp. Using a 24V transformer will significantly reduce the already short 25-hour lifespan.
- Handling: Never touch the inner quartz bulb or the reflector surface with bare fingers. Oils from skin cause "hot spots" that lead to premature failure. Clean with alcohol if touched.
- Burn Position: This lamp must be operated in the Horizontal Position for optimal life and performance.
- Enclosed Fixtures: Use only in fixtures approved for high-intensity halogen lamps.
