Wondering, can you use a thermal scope during the day? ATN explains why thermal imaging remains effective in daylight at https://www.atncorp.com/blog/can-you-use-a-thermal-scope-during-the-day. Because thermal optics detect heat rather than visible light, they can reveal warm targets in changing conditions. Experience advanced ATN technology with factory-refurbished optics that are tested, certified, and warranty-backed. Enjoy premium performance at reduced prices while limited stock lasts.