If weight is a concern: Velogical rim dynamos (works in wet and slippery conditions as well), 75 grams. Still wiring required, but very short wiring. Also the new SP dynamos (9 series) have in the best case 300 grams.
The mentioned magnetic connectors are not needed, Schmidt/SON offers a cables with coaxial plugs

Otherwise the mentioned Outbound lighting is good, i also recommend the B&M Ixon Space, with can be charged while in use (via USB). The Space has a bit narrower light field than the Outbound lighting (basically the same as the IQ-X, just with more power), but is better suited for seeing things in the distance. The Pedalcell system might be interesting, can be switched off and used as backup power source if one runs out of battery.