Its the year 2030 " you now have high bandwidth secure laser communications straight to your VR headset without an Ethernet cable. Result! However, you need to keep your window blinds closed; otherwise, daylight or a passing car at night takes you straight back to 1990s bandwidth. Should we regulate light so these exciting new technologies can be used? Or are the boffins out of control? Ask Dr Ross Donaldson (Heriot-Watt University)!