PS

*ˀr - light (Fronzaroli 1965a: 138, 144; Kogan 2011: 196)

Akkadian
urru - morning (CAD U-W 243, AHw. 1433)
Ebla
ù-ru₁₂ /ˀurru/ - light (VE 817, Kogan–Krebernik 2021b: 683)
in ù-ru₁₂ mu-si-im /ˀurru mūšim/ 'light of the night'
Ugaritic
ˀur - warmth, heat (DUL 94-95)
Ugaritic
ˀar, ˀir - light (DUL 94-95)
Hebrew
ˀōr - light (HALOT 24)
Arabic
ˀirrat- - heat, flame (LA 4 18)
Arabic
ˀuwār- - heat, flame (LA 4 39)
Geez
ˀer - sun, light (CDG 36, EDG 118)
Tigre
ˀarwa - flame (WTS 359)
Tigre
ˀarwä - to flame, to blaze (WTS 359)
Soqotri
έrir - to light, kindle, illuminate (LS 75)