I'm surprised no one has mentioned the Cateye Volt series.

Whilst there is the 150 & 200 Lumen models, I prefer to start with the Volt 300 and up.

I have two Volt 300's on my handlebars and a Volt 800 on my helmet.

The Volt's have a daytime flash, which brings in the light's highest lumen output.

So I like using the Volt 800 daytime flash during the day.

I will probably acquire their newly released Volt 1600 in the New Year.