I bought a 6 pack of 5000k LED tubes of Amazon for $42 a month ago and am very happy with them.
I have 5 two tube lights in the garage that were in the house when I moved in 20 years ago. They all are having ballast problems (flickering, buzzing, not turning on every time, going through bulbs quickly) so I figured it was time. The ones I got could be used with ballasts, but seems many were having issues, and I figured since they were going bad, just take them out.
Lights are super bright, no noise or flicker at all, and turn on every time (there is a 1/2 second delay from when the switch it on till the lights turn on, no big deal though).
I need another 12 bulbs to finish the house. 3 housings inside (2 two tube lights and 1 4 tube light) and 2 more two tube fixtures in the garage.
I am going to order some clear lens ones next time and see if they are brighter for the garage. I debated getting 4000K for inside, but my wife said she likes the whiter 5000K. I may put the 5000k in the kitchen first before ordering more to see if she really is OK with that white a light inside.