Night sights have glowing dots. They appear white in day time and low green usually at night. They do this with tritium so there is no need for batteries.

Night sights Glow in the dark

Hi Jeffrey, Night sights glow in the dark using tritium. I recommend this with all firearms used for home protection.

Night sights Glow in the dark

White Dot sights are non iluminated and are not visible in low/no light environments. Night sights use Tritium Inserts that have a luminescence property that is highly visible is low/no light environments.