This OSRAM EVA 100 watt halogen bulb has a base of GY 6.35 2-pin. It has a diameter of 0.453 inches, a filament of C-Bar-6 and a clear lamp finish. The OSRAM EVA 64623 HLX use Xenon instead krypton gas (XENOPHOT HLX VERSION) and have a 10% higher luminous flux with same power consumption. This OSRAM EVA bulb has a shape of T4, a rated life of 2000 hours and a voltage of 12. It also has a lumen flux of 2800 and a maximum overall length of 1.716 inches. Applications • Dental• Ophthalmic• Microfilm• Microscope• Projector• Scientific• Studio Features• OSRAM EVA (HLX 64623) Halogen Bulb• Single Ended Lamp• EVA 64623HLX• Low Voltage Bulb• Replacement Lamp for Machine Vision Measurement - Optical Comparator• Replacement Lamp for Microscope - Illuminator• Replacement Lamp for Scientific - Oscillograph Recorder