Another fish very similair to these is the Ember Tetra (Hyphessobrycon amandae). They look almost exactly alike, to the point where I wonder if they aren't the same but for the scientific names being different. I believe Embers are more red and don't have the same "glow".
Thought I'd mention them, for those that want something similair but smaller (Embers only get 2 cm).
An old "staple" in the hobby, a beautiful, peaceful schooling fish. Care is similar to most tetras; keep a school and they prefer soft water and places to hide. Fairly easy to breed given the right water conditions.
Some of the best Tetras I've owned (I've had Neon and Black Tetras). Very hardy and a little on the shy side. I have 7, currently. They will do some laps around the tank as a school, but mostly settle and shoal near the bottom. Absolutely beautiful with dark backgrounds and substrates.
The Glowlight in this pic looks washed out and kind of stressed! (Poor little thing.) I have eight of them, three of which have been with me for four years. They are the very best fish for beginners (imo). Be sure to keep as many of them as you possibly can. The bigger the school, the happier they are.