At Bluefire Lighting, our goal is to help every household reduce energy costs and at the same time, bring a quick return on investments. This A19 6W LED bulb (5000K) produces a cold and daylight kind of light, while costing only $0.79 electricity yearly (based on 3-hour/ day usage, 12¢/kWh). As a result, you save $4.47 a year in your energy bill over a 40W incandescent bulb ($5.26 yearly electricity cost). Your initial investment is going to be paid off in just less than one year. They are perfectly suitable for office lighting, garage lighting, outdoor lighting, work lights, track lights, recessed lights, and hallway or corridor lighting.