I put it on a shelf so that there would be at least a little bit of light at the entrance to the flat so that there would be no need to stomp around in the dark. Did not even adhere to any of the surfaces. From one to two meters away, it functions properly and carries out its intended purpose. I use it at the lowest possible brightness setting, which is really quite dark. But I don't need more for my assignment. It functions most well in total darkness. It is possible that it will not function properly at a particular level of lighting. Yet this is even better news for me, as it means that I do not require any more light to see under these situations.
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