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The seeming aversion of flying insects because they can not see colour yellow very well, yellow light is due to differences between their sight and that of human beings, Humans process colours on the deep blue to dark red end of the light spectrum best while flying insects best see ultraviolet energy (such as black lights). As these are energy saving low wattage compact fluorescent units they are good for porch lights, or in suitable fittings used in garden lights. so now you can have outdoor lighting and fewer insects. Compact energy saving fluorescent light bulb this unit produces a lot of light, any light will attract insects and bugs but because it as a special yellow coating does not attract as many, advantage when used in a suitable fitting provides a lot of light for that outdoor party.