hi Adriboy,
that is not a light test. to do a light test, you must flash the light very close to the handle like this:
btw how long have you had that Jambiya? Did you buy it or is it a family heirloom. I have heard that some Indonesian families have Yemeni ancestry. IF so then it is possible it is Rhino. It does look a bit like Rhino and not like normal horn. Any ways repeat the test as in the pic below. If you see the orange glow, you are in luck.
