GE Lamps is A-21 Incandescent lamp has soft white finish and comes with E26 medium screw base. It is made of neodymium with C-2R or CC-8 filament and has light center length of 3.87 inch. It has voltage rating of 120 volt, power rating of 30 watt and light output of 305 lumen. Lamp measures 2.625 inch diameter x 5.250 inch and offers average lifetime of 1200 hours. It is specifically designed for 3-way lamps in home or office and offer a range of light levels. Lamp is ideal for use in table lamps and enclosed fixtures. Great for use in table lamps and enclosed fixturesEstimated yearly energy cost is $3.61/$8.43/$12.05 based on 3 hours per day $0.11 per kWhLasts 1.1 years based on 3 hours per day usageA21 shape with medium base2800K soft white light appearance305/995/1300 lumens providing fresh, energizing lightUses 30/70/100 wattsGE soft white 3-way bulbs provide three levels of light for maximum flexibility, low for mood lighting and energy savings, high for task lighting. Use GE soft white 3-way bulbs warm, pleasing light without harsh shadows in table lamps and floor lamps