ST19 LED light bulbs use 5W or the equivalent of 40W, emitting 425 lumens of brilliance. They are fully dimmable for maximum comfort and design - day and night. quantity of 16 LED bulbs Healthier Homes: Reduce eye strain and discomfort with glare and flicker-free illumination. Reducing blue light hazards helps define home and activities in vivid, accurate color. More definition means less eye strain. Focus and see more naturally. Long-Lasting: With a lifespan of 15,000 hours, or 13+ years, these LED bulbs make for an ideal replacement for old incandescent bulbs. Install in your home's high-traffic zones or hard-to-reach areas for years of illumination. Cost Savings: Take advantage of energy savings with an estimated cost of up to $0.60 a year. Light up home longer with cost-efficient LED light bulbs. Energy Star rated. Instant On: Our LEDs have no warm-up time. When you flip the switch, they light up instantly with 425 lumens of brightness, 90 CRI, and daylight illumination.