Globe 48412 13-Watt Ultra-Mini Compact Fluorescent Spiral Bulb (60-Watt Incandescent Equivalent), Cool White, 4 Pack A 13W CFL is equivalent to a 60W regular incandescent bulb. It uses less energy, and helps protect the environment. Depending on your kWh rate, you will enjoy significant dollar savings per bulb! Globe Ultra Mini cool white compact fluorescent light bulbs simulate daylight making them ideal for offices, reading areas, kitchens, and workshops. Globe's Ultra Mini size fits most fixtures that require a standard medium base regular incandescent bulb. The lifespan of one Globe Energy saver bulb is 8,000 - 10, 000 hours and will outlast 8-10 regular incandescent bulbs. Globe Energy saver bulbs are warranted to last 5 years! If it fails before that time, we will replace it.