God said, Let there be light, and there was light.@Genesis 1:3
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John M. Neale (1818-1866)

Attributed to Ambrose of Milan, 6th Century (O Lux beata Trinitas); translated from Latin to English by John M. Neale, 1852.

Bromley (Clarke) Jeremiah Clarke, 1700 (🔊 pdf nwc).

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Jeremiah Clarke (ca. 1659-1707)

O Trinity of blessèd light,
O Unity of princely might,
The fiery sun now goes his way;
Shed Thou within our hearts a ray.

To Thee our morning song of praise,
To Thee our evening prayer we raise;
O grant us with Thy saints on high
To praise Thee through eternity.

All laud to God the Father be,
All praise, eternal Son, to Thee,
All glory, as is ever meet,
To God the holy Paraclete.