Brightness Quality: 1270 Lumens. Energy Info: $8.67 Based on 3 hrs/day, 11 cents / kWh. Cost depends on rates and use. 72 Watts. Package Info: 4-Pack 4 Bulb Info: Halogen Bulb Life: 0.9 Years Based on 3 hrs/day. Bulb Appearance: 2800 Kelvins. Misc: 100 w incandescent modified spectrum replacement (These bulbs use less energy than 100 watt incandescent modified spectrum bulbs while providing more light output [1270 vs 1260 lumens]). Uses 28% less energy (These bulbs use less energy than 100 watt incandescent modified spectrum bulbs while providing more light output [1270 vs 1260 lumens]). Lasts 0.9 years (Based on 3 hours use per day). Made in China.