Cool project. Although i wonder how heavy is it after you replace unused parts with the lamp. I have concern the carabiner isn't durable enough for hanging stuff 24/7.
The empty miner shell is made of aluminum so it's actually really light. I just used a floor scale to weigh it and it says 2.4 pounds which is just over 1 kg at 1088.622 grams. I don't have any concerns about it falling down and if ever I do, I would just use some more robust mounting hardware.