GE Lamps Quartzline double-ended halogen lamp has voltage rating of 120 volt and power rating of 300 watt. It has an average life span of 2000 hour and offers brightness of 5950 lumen. The T2.5 halogen lamp operates at a color temperature of 2950 kelvin. It offers nominal initial brightness of 20 lPWs. Halogen lamp has R7S recessed single contact base and c8 filament for better performance. Double-ended halogen lamp has 0.3120 inch diameter. Halogen lamp is an ideal choice to create a dramatic effect and offers enhanced light distribution. It is suitable for outdoor carriage and post lights applications. It measures 0.312 inch diameter x 4.688 inch.