Mr.White, Thanks for the response. I will try my best to answer… 1. The new light is made of metal, this is the model: https://www.amazon.co.uk/gp/product/B01N7TXW9I/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&th=1 2. If you mean on the new lamp the second terminal is an earth - the fitting nut a...