It started with one!
It started with one small Olight recommended by a EDC YouTuber and has now grown to a point where it's tough to choose which Olight to carry each day. I've used and recommended Olight's to everyone who has been amazed by the compact size and brightness (and even a more than a few who hadn't seen mine in action, but needed to know about them anyways). The end result being many of my family and friends now have at least one Olight. I've always been impressed with the quality and customer service of Olight and the lengths they have gone to (and continue to go to) for their customers. O-Fan day being just the latest example.