Unlike other bug killers which emit loud zapping sound, ElectriZap is silent and can be used anywhere at any hour without causing disturbance. This model also comes with some features you won't find on other models at higher prices, such as a coverage of 1.5 acres. Their compact size makes it easy to use them in a variety settings. This bug-zapper light is a great way to save money, as well as the need to apply bug spray every day. Plus, on its lowest setting, it can run for up to twenty hours with just one charge. With features like a solar-powered blue LED, rechargeable batteries and a dimmer, we think it's a great improvement over the previous version. Bug bulb Light Zappers on the other hand are non-toxic. Keep in mind that ZappLight will only work on flying bugs, so roaches, ants, and spiders may need to be dealt with in other ways. It's always a smart idea to buy ElectriZap only from reputable websites or reputable sources to ensure that you are receiving a genuine product. It is recommended that the bulb be allowed to cool before removing it from the plastic cage.