What scooter?
Stock light?
I'd give the 2018 Piaggio Liberty and "B+" - with it's
stock halogen 60/55W bulb with a measly little 6AH battery!
The LIKE200i with it's 35/35W bulb a solid "C" (14AH battery)
The Burgman 400 twin DRL's an "A" once I adjusted them properly (12AH battery)
Honda forza 300 with twin DRL's an "A-" (12 AH battery)
All are with YUASA batteries.
Really like that the Suzuki and the Honda both ran twin head lights "ON" as standard.
(A world of difference between the newly designed Liberty light, and the 2009 designed light in the LIKE)
Stig