Place the device 16 to 39 feet above the ground for best mosquito-capturing results. Something to remember is that all the USB mosquito killer lamps on this list are specifically for indoor use. The darker the room the better. It contains no chemicals emits no radiation and not toxic. Its the best bug zapper on the market. Aspectek Powerful 20W Electronic Indoor Insect Killer Review. Stinger Cordless Insect Zapper Lantern Review. Seeking a portable mosquito killer that is safe for pets and kids the Electric Mosquito Trap Lamp is the best choice. 4 Reviews of the 8 best lamp to kill mosquito and insect. The lamp has high RPM fans fitted on it which creates a vortex to create a suction effect to suck in the mosquitoes.