We conducted a matched sample simultaneously recording the activity of bats on an illuminated site of a lamppost to High Pressure Sodium and a site unlit control. The two sites of each pair, Similar to a habitat perspective, were located along hedges or forest edges and positioned about 200 m. Twenty-four pairs were located in towns practicing night off streetlights and twelve pairs were located in cities that allow their lamps lit all night.
Sisi uliofanywa kuendana sampuli wakati huo huo kurekodi shughuli ya popo kwenye tovuti illuminated wa lamppost kwa High Pressure Sodium na tovuti unlit kudhibiti. maeneo mawili ya kila jozi, Sawa na mtazamo mazingira, walikuwa iko kando ya ua au kingo za misitu na nafasi nzuri kuhusu 200 m. jozi ishirini na nne walikuwa ziko katika miji mazoezi usiku mbali za mitaani na jozi kumi na mbili walikuwa ziko katika miji kwamba kuruhusu taa zao lit usiku wote.