Well, there's a saying, "you get what you paid for". Something at that pricepoint, I'd question it's capability for providing lighting that a cyclist needs. When I looked for a light I looked at several factors - lumens, lenses and batteries. I eventually went with a pair of Dinotte 400Ls, one bike mounted and the other helmet mounted. The bike mounted light has a larger capacity battery and long throw lenses mounted. The helmet mounted light has a smaller lighter battery and fitted with one long and one wide angle lens. I can ride high power on both lights for about three days (during the morning and night commute) before recharging the batteries. My setup is great for me as I commute in the dark through a forest and it can get pretty dark with no moonlight.
OP - What kind of riding do you do at night? Is it in an urban environment with streetlights? Rural backroads? Do you need the lights to be seen? or to see? I'd probably consider the light you linked but only as a back-up for riding in the city. It could be useful as flashlight off the bike.