I just use a little hand held one I got on Amazon.
Suptig Underwater Lights Dive Light 84 LED High Power Dimmable Waterproof LED Video Light Waterproof 164ft(50m) for Gopro Canon Nikon Pentax Panasonic Sony Samsung SLR Cameras https://www.amazon.com/dp/B07BY7127G/ref=cm_sw_r_apan_i_VWD4D39AQWTZPA75JWV0?_encoding=UTF8&psc=1
THIS might be a good light.
I'm not up on the newest versions of the Gopros, but I think that despite being labelled water-proof, this mission would be best suited by protecting the camera with these fairly cheap but toughUW housings.
Nothing too fancy, just got it off Amazon here
I think I got one of these. The wide-angle is incredible, as it is additive to the light on the wheel itself, which is narrow. I don't see the lumens rated but at high power it is really really annoying to anyone else and really great to the rider. They will see you and you will see every bump. The gopro mount means if you can find a way to mount a gopro, you're good. The only problem is the gopro mounts break with that much weight, but they're cheap.
https://www.amazon.com/Suptig-Underwater-Dimmable-Waterproof-Panasonic/dp/B07BY7127G/
Lights are really easy to add. I put on one like this, which I believe is above "best in class". Has a gopro mount so I just stuck it on.
https://www.amazon.com/Suptig-Underwater-Dimmable-Waterproof-Panasonic/dp/B07BY7127G/
Super suit for sure. The selfie stick with a light, then my camera. Here's the light I use:
Suptig Underwater Lights Dive Light 84 LED High Power Dimmable Waterproof LED Video Light Waterproof 164ft(50m) for Gopro Canon Nikon Pentax Panasonic Sony Samsung SLR Cameras https://www.amazon.com/dp/B07BY7127G/ref=cm_sw_r_cp_api_i_PydJCbRX4TC0Y
And here's the selfie stick:
Amobios 12-37 Inches Waterproof Telescoping Extendable Selfie Stick Rust-Preventing and Anti-reflective Pole for GoPro Cameras https://www.amazon.com/dp/B01AHR6I7O/ref=cm_sw_r_cp_api_i_xBdJCb3DZJV3Y
I prefer the light over using a filter. I have the backscatter red filter, but I don't like how it doesn't stay open when not in use. Keeps flapping into view during recordings. The new GoPros are supposed to have better color balance.
I'm doing my inaugural dive with Hero 7 Black tomorrow. Florida Springs! Looking forward to the improved stabilization. Try turning that on in the settings.