brightness
no.gah denotes visible radiance, especially around fire, glory, dawn, or celestial light, and can picture righteousness shining forth.
The noun most often denotes visible radiance surrounding fire, lightning, or manifestations of glory; it also occurs with dawn, heavenly lights, and the contrast of light with darkness, while Isaiah 62:1 uses the image for righteousness going forth visibly.
Senses in use
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Radiance around fire or glory · dominant
The singular noun marks visible radiance in scenes of fire, lightning, cloud, and glory. In Ezekiel 1:4 the APB renders a great cloud with flashing fire and “brightness around it,” while Ezekiel 1:27 and Ezekiel 1:28 describe brightness surrounding the fiery appearance and the likeness of glory; Isaiah 4:5 and Habakkuk 3:11 connect the construct form with flaming fire and a lightning spear.
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Light associated with dawn and heavenly bodies · common
The noun occurs in comparisons involving morning, dawn, and celestial illumination. In 2 Samuel 23:4 the APB renders a cloudless morning with “brightness,” and Isaiah 60:3 places kings in relation to the brightness of dawn; Amos 5:20 and Joel 2:10 set it within contrasts or changes involving light, darkness, sun, moon, and stars.
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Image for righteousness becoming visible · occasional
In Isaiah 62:1 the singular noun supplies the comparison for Zion's righteousness going forth, alongside salvation like a burning torch. The APB renders the clause “until her righteousness goes forth like brightness,” using visible shining as the image.
In the Anselm Project Bible: The APB commonly presents the noun with “brightness,” especially in fire-and-glory scenes and in Isaiah 62:1. Elsewhere the verse-level translation uses wording such as “light,” “shine,” or lacks a clearly isolable English counterpart, so these are whole-verse renderings.