In the earlier edition of the Liber Usualis, p268 does have a setting of the Te Lucis "In Festis et Octavis B. Mariae Virginis. It seems like it was removed in the 1962 edition, but the cross references remain.

Komplet fur alle Tage is awesome! Thank you!

I'm not personally convinced that eliminating the Marian tone (and others) necessarily follows from the rubric to not change doxologies (in the 1960 Breviary reform), but it looks like the editors of the Liber Usualis in the 60s thought so.

The editors tried to reuse as much of the typeset pages from the earlier book. The problem was that the Hymn would need to be re-typeset, as the doxology was wrong, in my edition it suggests to turn to a page to find the chant but it is missing. This appears to be an error as a new page should have been inserted, but was never finished of at least not inserted in the final version.

I would follow the practice as suggested in the FSSP book to use the Marian tone with the common doxology, which would more closely follow the Rubrics.

N.B. The Liber Usualis is not an approved book!

The English/1961 Liber (as scanned by the CMAA) does retain several typeset versions of Te lucis with proper doxologies and melodies. But on p. LXVIII-LXVIX of the same book, it clearly states that the doxology shouldn't change (as in the new breviary). And while the melody should still change for the Season, it shouldn't for any particular feast. And that includes feasts within a season... which is why the Advent tone is now (1962) never used for the feast of the Immaculate Conception.

The rest of the melodies mentioned on p. 269 will no longer be used, as well as that given for feasts of Our Lady, p. 1256.

I doubt this consolidation is merely due to a technical issue or reluctance to re-typeset the hymns with the common doxology, because in the same book all of the seasonal melodies of Te lucis and the other hymns of the minor hours were re-typeset. In the 1961 edition, the remaining melodies with changed doxologies were meant to be ignored, per the updated rubrics in the front.

For what it's worth, my 1962 Liber (all Latin, no. 780) has replaced the proper melody/doxology hymns (at Compline, Terce, Sext, None) for Sacred Heart and Christ the King with a copy using the normal melody for I class/Solemn feasts, and updated the various rubrics and references for the hymn tones for the other effected feasts.

Now the idea that the melodies of the hymns at minor hours should change for seasons but not for feasts isn't in any Vatican decree I've ever seen, but it appears that the Solesmes/Desclee editors were quite convinced of it, and in fact the modern Liber Hymnarius (by Solesmes) is similar in this regard.

I still think the problem is with the 1962 L.U. They were trying to keep up with changes that came think and fast, and they were not very successful.

I don't think the Liber Hymnarius is a good example of a book to compare to the L.U. They have different purposes, the L.H. is more a scholarly work including the latest texts from the pen of Lentini and the melodies chosen by Solesmes as being most authentic. N.B. The 'authentic melodies have been and no doubt are subject to change as further research is completed.)

To give some understanding of how these changes may have come about, the following is well worth reading...

http://liturgicalnotes.blogspot.co.uk/2015/09/originally-posted-on-april-24-this-year.html