Current floodlights were installed by the speedway club. They ran a season long raffle to raise funds with Jason Crump's race suit being the top prize. 1999?
This might be of interest to some who want to take in more of Wales as part of their Cardiff trip:
https://cadw.gov.wales/about-us/news/open-doors-2019
Map here if it helps
https://cadw.gov.wales/visit/places-to-visit/find-a-place-to-visit/map
Like I said, you can take out a free 7 day trial. The link I provided works if you click through.
Edit: just seen you can also get a free 7 day trial via Amazon Prime Video for those that have it.