Really hoping someone can help here! Im a product designer, not a chemist/physicist so apologies in advance for any stupid questions. I'm developing a new table lamp which is turned on and off by tilting it. For prototypes I have used a carbon based conductive ink but this isnt really suitable. I have looked at things like woods metal, mercury and gallium indium tin, but all of these have various problems - too high melting point, toxic, and wets to glass very easily! I really hope someone can offer some opinions!