The Bavarian Illuminati had no connexion with Luciferianism so far as I can ascertain, if 'Luciferianism' implies veneration of or respect for Lucifer.
My immediate source is a review of Vernon Stauffer's New England and The Bavarian Illuminati :
Well-entrenched tradition has asserted that the secret force
responsible for the New England [civil] disturbances [in the late 18th century] was the Bavarian
Society of the Illuminati. In the third chapter, therefore, the
author discusses the life of Adam Weishaupt, founder of the
Illuminati. He shows how, after "an educational experience
which had made him a passionate enemy of clericalism, Weishaupt, Professor of Law at the University of Ingoldstadt, arrived
at the conclusion that a general offensive against the clerical party
ought immediately to be undertaken . . . to overthrow
the forces of superstition and error." He would found a model
secret organization, "comprising 'schools of wisdom,' . .
wherein those truths, which the folly and egotism of priests
banned from the public chairs of education, might be taught
with perfect freedom to susceptible youths." On May 1, 1776,
the organization was founded. Under Weishaupt's sole domination, the Order was stagnant. With the accession, however, of
Baron Knigge, a Freemason of high degree, progress resulted,
and eventually an alliance with Freemasonry was effected.
Internal dissension, the scandalous lives of the leaders, and
political intrigues brought about suppression at the hands of the
Bavarian Government. On August 16, 1787, the Duke of
Bavaria "launched his third and last edict against the system.
The measures taken against the Order in Bavaria effectually
counteracted and destroyed its activities in other countries. (Joseph A. Murphy, The Catholic Historical Review, Vol. 5, No. 2/3 (Jul. - Oct., 1919), 265-270 : 267-8.)
Weishaupt clearly regarded the mainstream Christian churches as harbouring and spreading error, superstition, folly, and egotism. None of this suggests the least velleity towards Luciferianism. Indeed, I should imagine Lucifer was to be dispatched along with other clerical superstitions. (In this I wholly concur with Mauro Allegranza's opening comment, which can hardly be bettered.)
'Luciferianism' can also refer to 'the sect founder by Lucifer, bishop of Cagliairi in the 4th cent. AD, who opposed the supposed leniency of the Church towards epentant Arians' (Oxford English Dictionary). I assume these are not the Luciferians you have in mind.
Vernon Stauffer, NewEngland and the Bavarian Illuminati. Vol. LXXXII of Studies in History, Economics and Public Law by The Faculty of Political Science. New York: Columbia University Press, 1918.
Review by: Joseph A. Murphy
Source: The Catholic Historical Review, Vol. 5, No. 2/3 (Jul. - Oct., 1919), 265-270.
Hardly recent sources but I have been unable to find anything later.