Well recently I watched a movie called "The Right Stuff" and when astronaut John Glenn played by Ed Harris was orbiting Earth he claimed to see "Fireflies"

Here is a better descriptiion here: The spacecraft moved across Australia and across the Pacific to Canton Island. Glenn experienced a short 45 minute night and prepared the periscope for viewing his first sunrise in orbit. As the sun rose over Canton Island, he saw thousands of "little specks, brilliant specks, floating around outside the capsule." Glenn had the impression that the spacecraft was tumbling or that he was looking into a star field. A quick hard look out of the spacecraft window corrected this momentary illusion. He definitely thought the "fireflies," as he called the small objects, were streaming past his spacecraft from ahead. They seemed to flow by slowly but did not seem to be coming from any part of the spacecraft. As Friendship 7 moved into brighter sunlight, the "fireflies" disappeared. They were probably small ice crystals venting from onboard spacecraft systems.

So... ice crystals? Well lies have been told many times before...im surprised they didnt say "OH its just a weather balloon!" So can anyone enlighten me on what you think this may have been? Some type of UFO maybe?

In my opnion yes. May have been far off, so that's why they were so small. I would put them in the "lighted" UFO caterory.