Does Duha prayer require lengthening its Rak'at (units of prayer) similar to Qiyam al-Layl (night prayer), or is it performed with light Rak'at?

The Sunnah for night prayer is to prolong it, and for Duha prayer is to shorten it. It has been authentically reported from Umm Hani’ (may Allah be pleased with her) that the Prophet (peace and blessings of Allah be upon him) prayed eight rak'ahs for Duha prayer, and she never saw any prayer lighter than it, while completing the bowing and prostration.