I don't think their copy is accurate. "The ONLY once piece light effective day and night." I've got an Axiom Pulse 60 and I've been told by many people (and my observations of vehicles around me also indicates) that the light is QUITE visible in the daytime.

and it's $35.

Dinotte's theory seems to be that unless you are actually injuring the retinas of people, it's not bright enough.