Bluefire 6 Watts A19 LED Light Bulb, 5000K/ Daylight, 540 Lumens, 40W Replacement - 12PCS Value Pack Saves 85%+ in energy costs instantly compared to 40W incandescent light bulbs It pays for itself in less than 1 year of usage (see below Return on Investment Calculation*) Guarantee no buzzing noise (a noticable difference compared to other brands)