These long-lasting fluorescent light bulbs provide bright, cool white light to illuminate any indoor space. Producing 4100K light, these T12 linear tubes deliver a crisp illumination that won't cast unwanted color casts, making them ideal for work areas where accuracy is important. Each bulb runs on just 14 watts yet illuminates equivalently to incandescent bulbs using significantly more energy. The slim 1.5-inch diameter tubes fit neatly in most standard fluorescent fixtures. A two-pack allows you to replace both bulbs in your fixture at once for consistent light levels. These bulbs are designed to last over 10,000 hours, reducing replacement costs versus other light sources.