From the land of 10,000 lakes (and even more bugs!) comes Miracle LEDs Lovely Glow Bug Light. This 9W bulb means you use less energy replacing 60W traditional bulbs, saving up to $53/yr. We use cutting edge LED technology combined with time-proven methods to produce a chemical-free and safe method of pest control. The yellow spectrum, little to no heat output, and producing no UV light are what work together to light your deck, porch, or patio without attracting bugs. Insects and their food source love heat and are attracted to UV light, this bulb eliminates that with little to no heat output and no UV light. The yellow spectrum is effective because it is invisible to bugs, but has a pleasing glow for humans. This LED is even more safe being that its chemical-free and contains no mercury. Technical specifications: 2000 Kelvin color temperature, standard E26 medium base, 20,000 hr estimated lifespan, $0.84 estimated annual energy cost, U.L. Listed. Miracle LED Bug Lights are not a repellent. Bug Lights are designed not to attract the insects that do not see yellow & red spectrums of light.