Light Bulb Types
Bug light bulbs use yellow glass that is filtered in order to effectively prevent the attraction of insects. These light bulbs can come in a wide array of sizes, voltages and wattages. Some models of the yellow bug light are also made of energy saving CFLs. They are very effective at what they do and most people prefer to use them more than the typical outdoor lamps.
Manner of Operation
Obviously, humans and insects are not on the same page when it comes to light, otherwise all of us might be swarming the next closest street lamp. Humans only see the range of the light spectrum that is considered as the â€œlongerâ€ end, or the part of the spectrum that includes the colours from deep blue to dark red. Insects on the other hand only see and react to the short end of the spectrum, which is closer to ultraviolet light or black light. Yellow bug lights attract little, to no insects by effectively minimizing the shorter end of the light spectrum thus making insects think that this light bulb is unappealing. Experts also say that these bulbs sometimes appear invisible to the insect's eyes while providing visible light for humans.
Bug lamps are most commonly used outdoors because that's where the insects usually gather when the lights are turned on. However, that does not mean that they can't be used anywhere else, they can actually be used anywhere in your home where minimizing insect attraction is the main concern. However, it is important to note that while bug lights minimize attraction, they do not, in any way, eliminate or repel insects as these bulbs are merely unappealing to their eyes. Still, it's a lot better than seeing spiders spin webs on your lights to catch their next meal.