This is almost idenitcal to the Rock Star, and when there is a Rock Star Bonus, the same is true for the Night Star. It also resets and doubles theincoming likes, but at 3 hours, running these with Likenados is a little different.
Level 59 no longer requires the Night Rider, but you can still earn the achievement.
You can start a Night star as late as 4:59AM Fubar (7:59AM Eastern). The one achievement that this one is used for is Night Rider, which is required at level 59. When I got Night Rider, the Likenado didn't exist, and I ran many stars to get the likes before 5AM Fubar time. It's not documented anywhere, but you can get Night Rider after that time, IF you have an active Night Star. The 2500 likes must occur in the most recent 5 hours. My experience watching people go for Night rider is, Hour Number 1, is very good, but hours 2 and 3 are not so much. It's almost better to let the first star run out completely, and start a Likenado 90 minutes in. which resets likes. There will be 30 minutes left when that runs out, so starting a second star when the first one runs out, will still have the benefits of the Likenado. You can then run another Likenado and time it so that if you are short of likes when time is running out, start a new Night Star before 4:59 AM and then be able to run a Likenado starting AFTER that time to get even one more reset. I have seen people get Night Rider more than TWO Hourse late, because people waking up on the East Coast working westward, were able to get them enough likes in the last five hours.
Likes will "fall off" in about 10 to 15 minute increments, so the first hour after 5AM if you're short, will appear to be hopeless because you were so succesful during the first hour. By the time that hour ends, you will have fewer likes fall off, and have a better shot during the second and third hours after 5AM.
I have seen a few people not even start Night Rider until after 1AM Fubar time, and get it, because they didn't have ANY likes fall off for the first hour AFTER 5AM. The trick for counting this is to not use your like counter on your page, but go to MY Achievements, and look are your status for the Night Rider achievement. That's the one that counts.