Average life in hours: 2000Energy consumption in kWh / 1000h: 230=300WLumens: 4650Wattage: 230=300W90 day manufacturer warrantyInstructions for buying the correct bulbs: Base, shape and dimensions Socket: R7 with double ended 0.38 inch diameter. Shape: T3 type J118. Diameter: 9.5mm. Length: 118 mm. Please make sure the light source double socket base with this your lamp A. Please check if your lamp length is 118mm. Because there is a shorter version of 78 mm (3.13 inches) which can be seen in the photos. Please check these specifications before ordering. Luminous properties Power: 230W=300W. Luminous flux: 4650 lumens. Voltage: 220V, 230V, 240V AC. Beam angle: 360. Material: glass. Color Rendering Index (CRI): 100 for vivid and enhanced colors. Instant On No mercury. Lifespan: 2000 hours (1.8 years with average use of 3 hours per day). CE and RoHS certified. Set of 5 pieces. Use of halogen dimmers These halogen lamps can be dimmed if they are equipped with a dimmer. Suitable for incandescent and halogen lamps All incandescent or halogen lamps can be dimmed with conventiol dimmers, because these dimmers simply adjust the voltage level for dimming. Dimming with LED dimmers only leads to incompatibility, because LED dimmers work very differently. Please check your dimmer or light compatibility before purchasing.