Exposure Enduro light, I must have over tightened it and the triangle shaped but that clips into the bracket isn’t solid as the screw just turns and won’t fasten tight resulting on the light moving around. It was held firm with superglue and thread lock but fell off last night and now it has play again. I really need to attach the triangle bit permanently but I don’t know a welder and I doubt it could be welded anyway due to the material being very lightweight alloy.
Can you get a nut on the inside of the lamp body?
You might need to shape it to the curvature of the inside of the body & take the top off the nut to avoid a clash with the innereds.
If you go the glue route then I recommend liquid metal. Had some success with that.
An almost-like-new fix is very simple for anyone above averagely handy- drill new hole slightly further forward, tap that for the bolt. But a good epoxy will probably do it too (and also, shouldn’t stop you from trying something else later)