The luminous efficacy and durability of the batteries are good. The device is compact and has an eye for hanging for example on a wall. As long as the lamp is working, it is thus a good product. Unfortunately in my lamp, the build quality is very poor. The switch know after a few operations for intermittent contact. In addition, the conductor with the solder joint to + pole (battery supply) is pulled down to the very cheap designed board, although no mechanical load at this point could be seen for me. In order to use the lamp trotzem further, I have soldered the wire at another location of the board and bridges the switch. So I can use the lamp on. For someone who may be a bit of soldering, the lamp is also the case of defective repairable.
