Usage: 3 forms in 8 verses
Form Translated As     In Verse(s)
φλεγομένου blazing up LXX.Prov.29.1
φλέξει it shall blaze LXX.Deut.32.22LXX.Jer.17.4
it shall blaze against them LXX.Mal.4.1
φλέγον blazing LXX.Exod.24.17LXX.Jer.20.9LXX.Jer.23.29LXX.Dan.7.9

Liddell-Scott-Jones

φλέγω (phlegō) to blaze G:V

φλέγω,

[Refs 8th c.BC+]: future φλέξω [LXX+5th c.BC+]: aorist ἔφλεξα [Refs 4th c.BC+] —passive, future φλεγήσομαι [Refs 1st c.AD+] are found in codices; κατα-φλεχθήσεται [Refs 3rd c.AD+]: aorist ἐφλέχθην [Refs 8th c.BC+]aorist 2 ἐφλεγην [Refs 2nd c.AD+]: perfect πέφλεγμαι [Refs 3rd c.BC+]

__A transitive, burn, burn up, [φλέγων ἀκτῖσιν ἥλιος χθόνα [prev. author] “Pers.” 364, compare 504 ">Refs 8th c.BC+]:—passive, take fire, blaze up, ῥέεθρα πυρὶ φλέγετο [Refs 8th c.BC+]
__2 passive, to be inflamed, κάεσθαί τε καὶ φ. [Refs 5th c.BC+]
__3 metaphorically, kindle, inflame with passion, Ἄρεα.. ὃς.. φλέγει με [Refs 5th c.BC+]:—passive, burn with passion, [Refs 5th c.BC+]
__II light up, φ. λαμπάσι τόδ᾽ ἱερόν [Refs 5th c.BC+]; Ζεὺς διὰ χερὸς βέλος φλέγων making it blaze or flash, [φλέγων">Refs 4th c.BC+] letting the flame of mischief blaze up to heaven, [Refs 5th c.BC+]:—passive, blaze up, burst or break forth, βωμοὶ δώροισι φλέγονται [Refs 5th c.BC+]
__II.2 metaphorically, makeillustrious or famous, σὲ φλέγοντι Χάριτες [Refs 5th c.BC+]:— passive, to be or become so, ἀρεταῖς, Μοίσαις φλέγεσθαι, [Refs]
__B intransitive, burn, blaze, of fire, torches, etc., [Refs 5th c.BC+]; of lightning, [Refs]; of the sun, [Refs 4th c.BC+]: of armour, flash, νέφος ἀσπίδων φ. [φλέγων ὀφθαλμός 4th-5th c.BC: Aeschylus Tragicus “Fragmenta - American Journal of Philology” 243 ">Refs 5th c.BC+]; of fire-breathing bulls, φλέγει δὲ μυκτήρ [Refs 5th c.BC+]
__B.2 metaphorically, burst or break forth, of passion, θυμὸς ἀνδρεία φλέγων [Refs 5th c.BC+]; of grief, [Refs 3rd c.BC+]
__B.3 shine forth, become famous, [Refs 5th c.BC+].—poetical in early writers, except [Refs 5th c.BC+] [same places] (Cf. Latin fulgeo, flagro, flamma, Lett. blāzma 'glare of light or fire'.)

LSJ Scripture Refs: LXX.Deut.32.22