Can be mounted on a helmet
13\15, we do not recommended
We wanted to buy light (not heavy) light (flashlight).
Weight in sheet is shown without battery.
Also, this light produces dizzy noise while working (can be heard in an empty room).
We would never buy this flashlight if we knew, that it will weigh about 150 gr.
This flashlight is not that bad (and we gave it a pretty high rating), it just does not meet our expectations.