Even before COVID-19, scientists have looked into UV Lighting to kill viruses and bacteria. UV Lighting gets into the cells of the bacteria and viruses and messes with their DNA. However when humans are nearby this would also affect their normal cells (i.e. causing skin cancer etc.)
However scientists were looking into a more harmless UV lighting option, called Far-UVC lighting low in frequency enough to not affect humans cells, not penetrating further than the dead skin cell layer, but since bacteria and viruses are a lot smaller, they would still be affected. It also apparently works in seconds.
It has not yet been proven that this also works against the Covid-19 virus strand, however it might be an interesting idea for crowded places where potential dangerous droplets could instantly be made ineffective.
https://www.hepacart.com/blog/what-is-far-uv-sterilray
https://www.photonics.com/Articles/Far-UVC_Light_Could_Safely_Limit_Spread_of_Flu/a63116
http://www.columbia.edu/~djb3/Far%20UVC.html
Potential supplier already providing to airports, conference centers etc.:
https://www.ushio.com/product/care222-mercury-free-far-uv-c-excimer/
Here a TED talk on it:
Whether these lights could be introduced for corporate events is still a question in terms of it working for Corona, however it does work for other Influenza strands and bacteria which could still have positive effects.
UVC Robot
https://www.bl-g.ru/en/about/press_center/5015/
There is some more information regarding UV-C surface/air filtration and it's subsequent success from the CIE attached here (the CIE are the international standards body for Illumination). It's standard UV-C (rather than the Far UV-C which Carina mentions) but there is some information about how this could be managed and utilised.
Broadly speaking there are two main types, air filtration (which uses an enclosed UV-C array and an intake/extract fan which can run continuously, as per the install in Brussels - and surface disinfection, which has has been successfully used for many years in hospital / laboratory environments - this needs exposed tubes and cannot take place in an occupied space, so is mainly used overnight etc).
With some management and scheduling to ensure any venues/rooms are free of personnel, an install of fixtures (or combination of both types of technology) could effectively be used overnight to "clean" the room, and take further steps to provide a virus-free space. Alongside scanning and testing this has potential to have genuine use as another tool in the "Covid-Secure" toolkit.
I joined a presentation given by the Brussels Convention Centre yesterday - they have just completed a 1.5 million euro install of UV-C based air filtration. The session has been placed on Youtube - https://www.youtube.com/watch?v=0p34qz3o_5M&feature=youtu.be for anyone who would like more details.