https://www.gamespot.com/articles/fortnites-lightning-bolt-location-guide-where-to-s/1100-6460350/

Season 5 of Fortnite: Battle Royale is officially underway, which means players now have a new set of challenges to complete and Battle Pass rewards to unlock. Epic has kicked off the first week of Season 5 with seven new tasks of varying difficulty. We've already detailed where to find the Risky Reels treasure map, and now we've put together a guide to help you complete the other challenge that might give you some trouble this week: searching seven floating Lightning Bolts.

Like other challenges that task you with tracking down certain items, the Lightning Bolts can be found in various parts of the island. They are easy to spot once you're in their general area, and you collect them simply by holding the use button, as you would to open a chest. The difference, however, is that the Lightning Bolts are hovering in the air, and you can't pick up them while skydiving or jumping; instead, you need to build a structure and climb up it in order to reach them, so it is imperative that you have enough materials to get them.