It is a simple program aimed at capitalizing the most auspicious month of Dāmodara / Kārtika to introduce Lord Śrī Kṛṣṇa to as many individuals as possible, especially offering them a chance to offer ghee lamps to Krsna.
The Śāstras clearly elucidate the glories of this simple act of devotion, done knowingly or unknowingly. This ajnatya-sukriti, or unknowingly performing devotional service can elevate any sincere fallen soul to the transcendental abode of Śrī Kṛṣṇa. Thus, the potency of this activity is further increased.