Having watched plenty of Silent Witness and been impressed with Nicky's ring flash, I knocked this up from a large plastic container top, some 12v warm-white LED strip, a few switches and a battery... A piece of soft grommet edging was used to make it a push-fit on to the Fuji FinePix's 73mm lens front.
The switching simply allows a choice of lighting levels and shadow (left-right) options. ______________
Having done that, and pleased with the budget result, interest was recently sparked by another bout of Nicky's flashing, and I wondered about a commercially-built item. Was surprised to find these on Amazon.uk, and so cheap...
https://www.amazon.co.uk/PLOTURE-Displa ... 178&sr=8-4
They come with a variety of lens-size adaptors, and can operate either as flash, or continuous lighting.