Connected Nation - Pitch: Lighting the Future - David Wallis, University of Cambridge

Supplementary content information

Are you switching on to LEDs? The cost of LED manufacture could be cut by a factor of five by pioneering research that allows gallium-nitride crystals to be grown on silicon, rather than on sapphire. It is estimated that a worldwide move to LEDs, which are far more energy-efficient, would result in annual CO2 savings equivalent to the output of all the cars on the planet.

You must select the video player for these keys to function.

Keyboard shortcut Function
Spacebar Play/Pause when the seek bar is selected. Activate a button if a button has focus.
Play/Pause Media Key on keyboards Play / Pause.
K Pause/Play in player.
Stop Media Key on keyboards Stop.
Next Track Media Key on keyboards Moves to the next track in a playlist.
Left/Right arrow on the seek bar Seek backward/forward 5 seconds.
J Seek backward 10 seconds in player.
L Seek forward 10 seconds in player.
Home/End on the seek bar Seek to the beginning/last seconds of the video.
Up/Down arrow on the seek bar Increase/Decrease volume 5%.
Numbers 1 to 9 on the seek bar (not on the numeric pad) Seek to the 10% to 90% of the video.
 
Number 0 on the seek bar  (not on the numeric pad) Seek to the beginning of the video.
 
Number 1 or Shift+1 Move between H1 headers.
/ Go to search box.
F Activate full screen. If full screen mode is enabled, activate F again or press escape to exit full screen mode. 
C Activate closed captions and subtitles if available. To hide captions and subtitles, activate C again. 
Shift+N Move to the next video (If you are using a playlist, will go to the next video of the playlist. If not using a playlist, it will move to the next YouTube suggested video).
Shift+P Move to the previous video. Note that this shortcut only works when you are using a playlist. 

David Wallis, University of Cambridge

I was going to say, I’m Dave Wallace, I’m not Sir Colin. So I'm going to tell you about the Lighting the Future stand; that's the title of one of our research grants that we’ve had in Cambridge, that’s developing LEDs. Please come visit us, you’ll be able to see us, as we’ll be glowing away in the corner.

Gallium nitride based LEDs are a much more efficient lighting source than conventional lighting sources, and therefore have the potential to save huge amounts of energy. Potentially in the UK it could save 10% of the energy that we generate in total. So please come visit us and we'll tell you about how we've been also working with a company in the UK, Plessey Semiconductors, to turn the research into real products.

So there are real products that you can go out and we'll show you two catalogues where the research has been turned into real products that you can go out and buy. We can also then tell you about all the other benefits that gallium nitride can bring though its other properties, through using it as electronic material, where again it could save another 10% of the electricity we use. Thank you.