Amid this growing threat, Amazon made crucial changes to its annual Prime Day sale, which started on July 8, to attract more customers. First, it extended the sales event to four days; last year it was only two days long. Amazon has also ramped up advertising of the event’s steep discounts.

Amazon Prime Day has some of the biggest discounts we've ever seen on home projectors from budget to luxury. Check out our top picks before the sale ends on Friday.