Full titles read: "A VERY LIGHT SUBJECT !"

L/S a sunrise followed by several shots of footage of forest fires. The commentator talks about how thousands of years ago man was restricted by the light of the Sun, however, "Before long he discovered means of making his own light, and fire was his help mate. C/U of someone demonstrating how a fire can be made using a small stick rubbed into a large log. C/U of a diagram of someone holding a burning twig in the Eolithic period. M/S of a diagram of a flaming torch in the Palaeolithic Period. Various more diagrams demonstrating man's advanced progress with light down the years including the invention of the lamp, and candles.

M/S's of ornate candles and holders in a cathedral. Several more diagrams of advancements made in candlestick holders. The commentator demonstrate how gas can be made. C/U's of a clay pie being filled with coal dust and then sealed. The bowl of the clay pipe is then heated and a match is put to the end of the stem and a small blue flames leaps out of the end.

Good M/S's of a large light bulb inside a lighthouse. M/S of a lighthouse keeper cleaning the glass of the building. Various diagrams are used to explain the development of gas lamps and numerous light bulbs brought about with the discovery of electricity. M/S's and C/U's of the latest fashion in small electric lamps. The commentator comments that "scientist tell us that the glow worm is the most efficient giver of light." Nice animated cartoon of two men playing cards next to a lamp. A glow-worm leaps out of the top and says "Knock it off I'm TIRED !" The screen then goes black. One of the men replies in a cartoon bubble "blimey he's gone on strike. M/S of the glow-worm marching away with a banner that reads, "We want an 8 hour night."