LMAO best summary right here
Sounds similar to the concept of a swamp cooler to me; maybe look up how they calculate efficiency?
Also, swamp coolers are only effective below a certain temp, so you’d need to think about bypassing (cutting the fan and turning on air con) above a certain threshold
Hanklight D4K for $50 was my first portable enthusiast flashlight. I’m currently 4 hanklights deep and they’re loads of fun out in the country for spotting wildlife and general use with the open source Anduril 2 firmware (yes, flashlights can get firmware updates).
Link to Hank’s Site