Yep, just the H4 plug in.
I have an older LED model, but I guess they are placed in the wrong spot as they spread the light all over the place and are blinding upcoming vehicles.
I looked on the site mentioned, but there was nothing at $18, the H4 there is $7.99. Maybe it was $7.99 + shipping made it to $18...
Would this be the one used here?
https://www.kapscomoto.com/us/motorcycle...le-scooter.html