2 medium base A19 bulbs. Life (Life based on 3 hrs/day): 1350 hours. Estimated Energy Cost (Estimated yearly energy cost based on 3 hrs/day, $0.11/kWh. Actual cost depends on rates and use): $7.23 per year. For outdoor enclosed fixtures near patios, decks and party areas. Illuminates outdoor areas without attracting bugs. www.philips.com.lighting. Questions or Comments: 1-800-555-0050 or www.philips.com.lighting. Made in Poland.