13 Watt Spiral Lamp Red Compact Fluorescent 13 watt spiral lamp red, 120 volts with a medium(edison) screw base. 75% energy savings compared to a 60 watt bulb. 10,000 hrs. average rated life. Not for use on dimming circuits, timers or remotes. UL approved and CUL listed. Small size easily replaces standard incandescent light bulbs. Electronic ballast provides instant on, no flicker. Low mercury.