| LUMINANCE | From "light", the intensity of said "lux"; or, the brightness of a television (9) |
| LIGHT | Lux or luminosity thought by Plato to emit from the eyes like beams, thus enabling people to see (5) |
| LIGHTS | Word for animals' lungs, so called for their imponderousness; candles, chandeliers, Chinese lanterns, fairy bulbs, lustres, pharoses, windows or other sources of lux or, clues, hints and tips towards |
| MAGNITUDE | Apparent degree of brightness of a star, represented by a number on a logarithmic scale (9) |
| SHAFT | An arrow or spear; a sunbeam, lightning bolt or other column of light; the rachis or rib of a feather; one of a pair of thills of a carriage or cart; or, a well-like passage into a mine (5) |
| ANCHORMAN | Main presenter of a television program (9) |
| PANELLIST | Member of a television team (9) |
| SHAMBOLIC | Fake measure a round very large institute for candles to light the menorah (9) |
| ABSOLUTEMAGNITUDE | Measure of the brightness of a star |
| LUMEN | Unit for measuring the brightness of a light |
| WATTS | They indicate the brightness of a light bulb |
| GLOWS | The brightness of a marginal explanation (5) |
| LAMPPOSTS | They light the way (4,5) |
| DIMMER | A rheostat or switch for varying the brightness of an electric light (6) |
| NITS | Measurements of the brightness of light |
| STILB | A unit to measure the brightness of an object's surface (5) |
| GAFFER | Senior electrician of a television or film studio; or, a master glass-blower (6) |
| CHANNEL | Specified band of frequencies assigned for a particular purpose, especially the broadcasting of a television signal (7) |
| WANED | Decreased like the brightness of the moon |
| NEWSREADER | One of the job roles of a television journalist such as George Alagiah, Fiona Bruce or Huw Edwards (10) |
