WIRED @WIRED
Say hello to the "world’s largest artificial sun.” The enormous machine uses 149 lamps to simulate sunlight, making it a handy tool for testing things like solar panels or generating clean energy: https://t.co/Rih3eYVW79 (From 2017) 📸: Getty https://t.co/114zqtBqhz — PolitiTweet.org