Lightning Deals are discounts that are only available at a certain time or for a certain amount of inventory. On Prime Day, Lightning Deals are only available to Prime members. They may discount 100 units of a certain item for only one hour, and if you miss out, you miss out. You can usually save really big on Lightning Deals, but you have to keep your eyes peeled. We’ve done a lot of that for you, so keep checking back and we’ll keep our page updated!