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 elucidates the glories of this simple act of devotion, done knowingly or unknowingly. This agyatya-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.
Rūpa Gosvāmī quotes from the Padma Purāṇa that just as Lord Dāmodara is favorably inclined toward His devotees, so the month of Kārtika, which is also dear to Him, bestows great favor upon them, even for a little service or a little practice. It is even said that the benefit gained for service performed in the last five days of Kārtika is equal to that gained from service performed for the entire month. In other words, for a very small performance of devotional service in the month of Dāmodara, one gets a very big result—especially in Vrindavan. Also, Śrīla Prabhupāda has explained that wherever the Deities of Rādhā and Krsna are installed, that is also Vrindavan. So, even here our devotional service will be magnified “one thousand times.”
“You have asked about the specialness of the month of Kārttika, and the answer is that it is a special inducement for persons who are not in Kṛṣṇa consciousness to perform some devotional service. For persons who are doing nothing in Kṛṣṇa consciousness, it is an indirect inducement to take to devotional service in earnest seriousness, every moment is Kārtika. In this connection, there is a good example that sometimes a store gives a special concession to attract new customers. But for those who are already customers there is no need of a special sale. They will purchase at any cost if they know the important value of the goods. Similarly, those who are pure devotees do not aspire for any concession, and out of spontaneous love try to engage themselves in devotional service twenty-four hours each day, three hundred and sixty five days every year, without any stoppage.”