Product description
The Norman 4553 is a PAR46 halogen sealed beam aircraft lamp operating at 28 volts and 250 watts, commonly used for landing and taxi lighting systems on aircraft. It produces a narrow, high-intensity spot beam intended to provide maximum forward visibility during approach, landing, and ground taxi operations.

It is built to meet aviation durability requirements, with a rugged sealed-beam construction and vibration-resistant filament assembly for use in harsh flight environments.

Key specifications
Part number: 4553 (also MS25241-4553 / NSN 6240-00-816-4808)
Type: PAR46 sealed beam landing/taxi lamp
Voltage: 28V
Power: 250W
Base: Screw terminal
Beam pattern: High-intensity spot beam
Rated life: ~25 hours
Approx. output: up to ~300,000 candlepower 
Diameter: ~5.7 in (PAR46 format)
Length: ~3.1 in

Construction features
Quartz-halogen sealed beam design
Heavy-duty vibration-resistant filament
Precision-aligned reflector for focused beam output
Aircraft-grade rugged housing for thermal and mechanical stress resistance 

Typical applications
Aircraft landing lights
Taxi lights
Forward search/spot lighting on aviation platforms