Make a light for the Ark

The Alef Kabbala group (9 October 07) studied a discourse by the Lubavitcher Rebbe said on Shabbat Parshat Noach 5747 (1986) on the theme "Make a light for the Ark". Some explain the light is a window, some explain it is a lumionous precious stone. Now the Ark is called in Hebrew 'Teyvah', which also means 'word'. The Baal Shem Tov says that one enters the Ark, meaning the word of Torah and Prayer. How does one 'make a light' in one's Torah study and Prayer? Through one's own extra effort in study and in spirituality.