120 V. Indoor/interior. Brightness - 430 lumens. Estimated energy cost - $4.82 per year. Lighting facts per bulb: brightness - 430 lumens; estimated yearly energy cost - $4.82 - based on 3 hrs/day, 11 cents/kWh; cost depends on rates and use; life - 0.9 years - based on 3 hrs/day; light appearance - 2850 K; energy used - 40 watts. Operate in any position. These lamps comply with federal energy efficiency labeling requirements. Unconditional guarantee. Made in USA.