Compact, light, practical USB charger

I was looking for a bright, light and USB-loadable bicycle lamp. After a long search I had only bought the Sigma Pava. The was nice with 25 Lux light and not very big, but could not be charged with USB, you need an extra power supply.
The Owleye is again by 1/3 smaller (and lighter), as it has an integrated battery pack. USB cable is attending, so you as a PC or cell phone owners do not need extra power supply. The lamp has max. 30 lux, compared with the Sigma I realize the Lux 5 more but not very. The illumination is wider and more in front of the wheel as the comparison model. But I think the Sigma light cone focusierter and selectively bit brighter. The material quality is compared to the Sigma lamp schlechter- I agree with other reviews pretty, because the manufacturer could not refuel. The burning time I habet not been tested, but because the battery is smaller and less baugrössenbedingt Amper than the Sigma, I'm assuming that they do not burn as long. By the way you can change the battery as a spare part, I like that. The fastening on the handlebar keeps well, no potholes allow the lamp unimpressed. When Sigma still fixing my opinion as the whole lamp is processed better and more stable. But has the disadvantage that the concrete Sigma severe (fast) can be solved.
Incidentally, both lamps have a street legal, in size I have next to the Owleye No Items found with the Eugen machinations.

Price is also good compared when you berrücksichtigt that one does not require additional batteries and chargers.

Overall I like the lamp very well, they would be pricked when the material would still hochwärtiger, therefore, are there a small minus.