ECOBULB by Feit Electric, a leader in home electrical supplies.Uses 40W to produce the same light that and average 150W light bulb produces. CFL"s work best in fixtures that are on for a substantial amount of time per day (minimum 15 min per use). For best performance use in fixtures that allow airflow, such as table lamps, wall sconces, pendants and outdoor fictures. Do not use with dimmers or 3 way fixtures. Do not use in wet locations. Also it is not recommended for use in motion detectors.