|
|
Fourmilab is surrounded on three sides by farmland. In the summer, bugs are in every single place. Faced with this case, defence in depth is the one possibility: window screens, bats, Odonata on the pond, fly strips on the windows and swatters in every room, and because the final level of terminal defence, excessive voltage bug zappers with ultraviolet fluorescent lures. These are usually not elegant gadgets, but they get the job performed. The precept couldn't be easier-flying insects, whose compound eyes see lengthy-wave ultraviolet gentle that mammalian eyes don't, are attracted by the lure tube, which seems to emit a dim blue gentle to humans. To achieve the light, they must fly between wires electrified with between four and eight kilovolts which, when the insect completes the circuit, kill-a-bug. The one downside (not less than if you aren't a flying insect) is that they don't seem to last very long. After somewhat more than one summer, the bulb both begins to flash on and off like a strobe mild or simply refuses to mild at all.
My site; Zappify official website |
|
發表於