There’s some info here labeled “preliminary”, I’m not sure if its set in stone though.
The XHP50.2 makes about 4000 lumens in a modded Q8, which I think requires about 30W according to djozz’s output test. It will definitely get hot but perhaps the 70.3 will be a bit more efficient? Its the throw I can’t really work out: larger domeless LED vs smaller domed LED.