Today I discovered that the International Space Station has lightning detectors installed. Well technically they call it a Firestation Instrument and it includes "photometers to measure lightning flashes, radio antennas to measure the static (a proxy for the strength of the electrical discharge), and a gamma-ray electron detector." So yea... I'm just going to call it a lightning detector.
According to NASA: across the atmosphere of Earth, lightning flashes about 50 times per second. That’s 4.3 million times a day and roughly 1.5 billion times a year... and due to the "lightning detector" they've apparently gotten TWO really cool photos from those 1.5 billion flashes. So not a great track record but whatever, enjoy the space lightning!