Prince of Persia

Light Seeds are the collectables of Prince of Persia and although they are tied to story progression, you only need 540 to complete the game. They are found scattered across all areas where the healing has been performed and are collected simply by running into them. You will notice that initially you have milestone targets to collect (60, 170, 340 and 540) and once those are reached, you can teleport to the Temple and activate a coloured Power Plate which will help you gain access to otherwise inaccessible areas throughout the game, which is an actual requirement to reach all of the light seeds.

It should be noted that there are only 1000 'collectible' Light Seeds which will be the amount you should have, before you enter the Temple for the final time as the last one is given to you during the final scenes of the game.

Please refer to the Light Seed Locations - Complete Walkthrough for a full detailed written walkthrough for every light seed, or if you prefer video guides, I strongly recommend the brilliant series of videos on YouTube courtesy of user Kondarivan by clicking HERE

Caution:

On a final note, there are reports from around 2008/09 that people were experiencing a glitch where they were only able to obtain 998-999 Light Seeds (1000 to be precise as the last one you receive is post-game). It is unknown if this problem has since been fixed as information on it is hard to come by but there is additional information which seems to indicate the solution may lie in the City of Light owing to a strange glitch making one light seed count as two, see the Game Glitches FAQ for more info.