Brightness Quality: 400 Lumens. Energy Info: $3.49 based on 3 hrs/day, 11 cents/kWh. Cost depends on rates and use. 29 Watts. 120 Volts. Package Info: 4-Pack 4 Bulb Info: Halogen Both Bulb Life: 0.9 Years based on 3 hrs/day. Bulb Appearance: 2700 Kelvins. Misc: Energy saving (These bulbs use less energy than a 40W modified spectrum incandescent while providing more light output (400 vs. 350 lumens)). 28% energy savings. Unconditional guarantee. Questions? 1-888-423-0139. These lamps comply with federal energy efficiency labeling requirements. Made in USA.