Here you don't need more lumens, just a decent optical system that doesn't make this light an anti-aircraft spotlight. This light is called a city light, and it doesn't have a stupid cutoff and blinds everyone across the street.
Yeah... I have the varia rtl515 in the rear, and I'm thinking of buying a front light that can be used both at night and day. And as Garmin launched this model a few years ago, I wonder if a new front light model is planned.