26 watt bulb is equivalent to a 100W incandescent bulb * Produces 1800 lumens and will last an average of 10,000 hours * These work great in the Dayspot grow light and fixture * Compact fluorescent spiral bulb provides the light you need while reducing energy costs * 26-watt/6500k bulb is equivalent to a 100-watt incandescent bulb * Maximum wattage of 26, color temp 6500K, medium base type, 120-volt * Produces 1800 lumens and will last an average of 10,000hrs * This product weighs 0.3-pound