MaxLite HCS184WW6 18-Watt Home Comfort Series Compact Fluorescent Lamp Spiral (75-Watt equivalent) Warm White 4 Pack MaxLites 18W Spiral Compact Fluorescent Lamp has one of the lowest mercury contents in the industry. The energy efficient 18W Spiral Compact Fluorescent Lamp is equivalent to a 75W incandescent lamp and saves as much as 75% in energy costs. Instant-on, Instant Bright, ISIB electronics makes light comparable to that of an incandescent lamp. An ENERGY STAR qualified and UL listed product, MaxLites 18W Spiral Compact Fluorescent Lamp lasts up to 10,000 hours.