http://www.fpmt.org/teachers/zopa/advic ... khapa.html
Lama Zopa Rinpoche on Lama Tsongkhapa Day:
In addition to the other offerings, it is best to offer as many light offerings as you can. It is very common to offer lights on Lama Tsongkhapa day, even in Solu Khumbu, which is mostly Nyingma. Although the villagers and townspeople don't really know about Lama Tsongkhapa, somehow that day and night they still do lots of light offerings.
Just as many people often use lots of lights during Christmas and at marriages, we too should use lots of lights on Lama Tsongkhapa day and on special days of Buddha and other auspicious days, especially if we are not able to offer them everyday, which would be good...