Red Lums are collectable shards of energy which appear in several games in the Rayman series, most notably Rayman 2 and Rayman 3. They serve to replenish Rayman's health. Along with Yellow Lums, Red Lums are one of the two major Lum types featured in the games.
In Rayman 3, they resemble atoms, having a red orb in the centre orbited by smaller red dots. In some instances they appear in their original winged form, such as when they are transformed from Black Lums using the grimace and when they appear in cutscenes. The atom-like appearance recalls the Simple Powers and Double Powers from the original Rayman game, which, together with the Big Powers, were essentially that game's version of Red Lums.
Red Lums are the embodiment of vitality, and the origin of all life in the Glade of Dreams.
In Rayman 2
The Red Lums are full of vital energy. Pirates love them. Destroy them and you can take all the Red Lums which they have stolen for yourself.
Red Lums recover Rayman's health. In Rayman 2, if Rayman is injured, nearby Red Lums automatically approach him. Robo-Pirates love Red Lums and collect every Red Lum they can find. It seems that the Robo-Pirates actually eat them; when Rayman destroys a Robo-Pirate, Red Lums are often found inside them. In the PlayStation version, Admiral Razorbeard eats a Red Lum instead of the Yellow Lum he eats in the other versions, due to there being only 800 Yellow Lums instead of the usual 1000.
In every version of the game (barring the PlayStation and Game Boy Color releases), touching certain Red Lums in a group starts a countdown. The rest of the Lums must be picked up quickly or they will vanish when the timer expires.
In Rayman 3
In Rayman 3, the Glade of Dreams is attacked by an army of Hoodlums, sack-cloth creatures piloted by Black Lums. Each of these Black Lums – including their leader, André – is a corrupted Red Lum. If Rayman uses the grimace on a Black Lum, it will revert into a Red Lum.
Packed with energy, they restore Rayman’s life bar.—Manual, Rayman 3 (Game Boy Advance)
Red Lums also appear in the Game Boy Advance version of Rayman 3.
Rayman can collect these to increase his health when he is in need.—Manual, Rayman: Hoodlums' Revenge
In the Nintendo versions of Rayman Raving Rabbids
Made up of energy, they add life to Rayman's Life bar.
Red Lums appear in the Game Boy Advance version of Rayman Raving Rabbids. In this game, they resemble red Tings.