The sights in the first link you provide are NOT night sights. They will glow brightly during daylight, but not at night. For night sights, you need some with tritium in them. Tritium is a form of hydrogen that emits light (H3). Tritium, or "night sights", have small vials of tritium in them, which glow all the time. They don't have to be charged with a flashlight like traditional glow in the dark stuff, they just glow. However, you can't see their glow during daytime.
Fiber optic sights, on the other hand, glow brightly during the day. They have fiber optic filaments that capture ambient light, and focus it toward the shooter. That makes the ends of the filaments (the dots) glow brightly. As far as I know, the only sights that combine tritium and fiber optics are the above mentioned TruGlo TFOs.
I really like my Heinie Straight Eight night sights, but they are more than you want to spend. They are about $120. I think the cheapest tritium sights would either be Ameriglo or Glock night sights. You should be able to find a set for about $70-80. They will not be bright in daylight, however. They will just be black, with whitish dots. If you want bright in all conditions, you need TFOs. The last option is a sight like the Ameriglo Hacks. You can get a black rear sight with tritium inserts, and an orange front sight with tritium. During the day, it makes the front sight bright, then they both glow at night. Good luck on your search.