Weak luminosity, but very sturdy and handy ...

Contrary to some reviews, the luminosity should be classified at approximately 300Lumen in 3.7 Volt operation ... if the driver of a bulb at 4.5V operation of the LED are a little more juice I could not test, because my 3xAAA 18650 adapter, which in turn is reportedly in Amazon recommended here on this article and often bought together !!! Not fit !!! because it has the same diameter as the lamp! The lamp itself is very shock resistant, at least advance to 30cm for 10 sec waterproof, so for almost all the work to use it. A bag / belt clip as well as a modular attachment Chock the front ring are missing here, but this is only to be expected at this price. All in all 5 stars for value, 5 star for delivery / packaging but only 3 star for brightness, 0 stars for the purchase of an item of recommendation to this lamp does not belong.