Who is Placit.? Perseus doesn’t have the abbreviations used in Liddell and Scott and even when I access the abbreviations, they seem to be from earlier versions where Placit. does not appear for whatever reason. Google is also useless. I assume Plot. is Plotinus and Hierocl. is Hierocles. But the others? Plu.Fr.? Dam.Pr.? Steph.in Hp.?
ἔλ-λαμψις , εως, ἡ,
A.shining, flashing, Placit.3.3.12 (v.l.), Plu.Fr.inc.150: metaph., illumination, irradiation, Plot.6.4.15, 5.8, al., Dam.Pr.34; “τῆς ἀληθείας” Hierocl.in CA 20p.465M.
II. radiation of heat, Steph.in Hp.1.134 D.,al.
Edit: I’m looking at LSJ at the link above because when I click on all the abbreviations you listed, I get the title of the text, the author and part of the text.