A new patent pending filament design for the SPH Superior Performance Halogen lamp allows for superior field uniformity and increased lumen performance for multiple brands of PAR fixtures and ellipsoidal spotlights. The newly engineered filament geometry works with modern reflector technology to produce up to a 20% increase if fixture lumens over the GLC lamp. The universal G9.5 base will fit any socket that accepts the GLC, FLK, or FEL lamps.