Easy to Install: bug zapper replacement bulbs are easy to use and install, before installation, disconnect the power supply of the indoor bug zapper and open the grid, simply plug bug zapper light in and tighten, convenient to use both indoors and outdoors Effectively Attracts: our bug zapper light bulb includes a wavelength of 365nm black light tube and a 280-480nm white light tube, with wavelength range, white tube emit blue violet light, can effectively attract all kinds of mosquitoes; Ultraviolet light emitted by the black tube is effective in attracting flies, moths and other various types of flying bugs Safe to Use: bug bulb attract all kinds of flying insects by emitting light, don't use any harmful chemical or emit or harmful pollutant; Therefore, it not cause pollution to the human or environment, bug zapper replacement bulbs also can be applied as a night light, the blue light emitted by the white tube not damage the eyesight Durability and Quality: glass fluorescent mosquito light bulb, not only can be produces 80% UVA more than plastic LED tube, also can prevent bulbs burnt out in short time, bug zapper light lasts a long time with constant use, do not need to be replaced frequently Widely Compatibility: 10W T8 bug zapper bulb is a replacement, fits perfectly in most 20W electronic bug zapper